repo: update license

The commit includes the following updates which are prerequisites for
moving the repository under the eclipse foundation:

- updates the repository `license` (license file and `package.json`
  entry).
- updates the headers of source code,
- includes the header snippet to easily add new licenses.

See here for motivation: [motivation](#60)

See here for details:
[details](https://github.com/theia-ide/generator-theia-extension/wiki/Re-licensing-theia-ide-generator-theia-extension)

Signed-off-by: vince-fugnitto <vincent.fugnitto@ericsson.com>

.vscode/theia.code-snippets

@@ -0,0 +1,11 @@
+{
+    "Copyright-JS/JSX/TS/TSX/CSS": {
+        "prefix": [
+            "header",
+            "copyright"
+        ],
+        "body": "/********************************************************************************\n * Copyright (C) $CURRENT_YEAR ${YourCompany} and others.\n *\n * This program and the accompanying materials are made available under the\n * terms of the Eclipse Public License v. 2.0 which is available at\n * http://www.eclipse.org/legal/epl-2.0.\n *\n * This Source Code may also be made available under the following Secondary\n * Licenses when the conditions for such availability set forth in the Eclipse\n * Public License v. 2.0 are satisfied: GNU General Public License, version 2\n * with the GNU Classpath Exception which is available at\n * https://www.gnu.org/software/classpath/license.html.\n *\n * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0\n ********************************************************************************/\n\n$0",
+        "description": "Adds the copyright...",
+        "scope": "javascript,javascriptreact,typescript,typescriptreact,css"
+    }
+}

README.md

@@ -53,4 +53,11 @@ Publish with [np](https://github.com/sindresorhus/np#np--).
 
 ## License
 
-[Apache-2.0](LICENSE)
+- [Eclipse Public License 2.0](LICENSE)
+- [一 (Secondary) GNU General Public License, version 2 with the GNU Classpath Exception](LICENSE)
+
+
+## Trademark
+"Theia" is a trademark of the Eclipse Foundation
+https://www.eclipse.org/theia
+

package.json

@@ -14,7 +14,7 @@
     "yeoman-generator"
   ],
   "author": "TypeFox",
-  "license": "Apache-2.0",
+  "license": "EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0",
   "dependencies": {
     "yeoman-generator": "^4.0.2"
   },

src/app/index.ts

@@ -1,3 +1,19 @@
+/********************************************************************************
+ * Copyright (C) 2017 TypeFox and others.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the Eclipse
+ * Public License v. 2.0 are satisfied: GNU General Public License, version 2
+ * with the GNU Classpath Exception which is available at
+ * https://www.gnu.org/software/classpath/license.html.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
+ ********************************************************************************/
+
 import path = require('path');
 import Base = require('yeoman-generator');
 

src/browser/index.ts

@@ -1,3 +1,19 @@
+/********************************************************************************
+ * Copyright (C) 2017 TypeFox and others.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the Eclipse
+ * Public License v. 2.0 are satisfied: GNU General Public License, version 2
+ * with the GNU Classpath Exception which is available at
+ * https://www.gnu.org/software/classpath/license.html.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
+ ********************************************************************************/
+
 import Base  = require('yeoman-generator');
 
 module.exports = class TheiaBrowser extends Base {

src/electron/index.ts

@@ -1,3 +1,19 @@
+/********************************************************************************
+ * Copyright (C) 2017 TypeFox and others.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the Eclipse
+ * Public License v. 2.0 are satisfied: GNU General Public License, version 2
+ * with the GNU Classpath Exception which is available at
+ * https://www.gnu.org/software/classpath/license.html.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
+ ********************************************************************************/
+
 import Base  = require('yeoman-generator');
 
 module.exports = class TheiaElectron extends Base {

test/generator-test.js

@@ -1,3 +1,19 @@
+/********************************************************************************
+ * Copyright (C) 2019 EclipseSource and others.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the Eclipse
+ * Public License v. 2.0 are satisfied: GNU General Public License, version 2
+ * with the GNU Classpath Exception which is available at
+ * https://www.gnu.org/software/classpath/license.html.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
+ ********************************************************************************/
+
 var assert = require('yeoman-assert')
 var helpers = require('yeoman-test');
 var path = require('path');