README: configuration options and some commentary (closes #87)

README.md

@@ -14,6 +14,11 @@ The following language server protocol requests are currently supported:
 - symbol
 - typeDefinition
 
+The following configuration options are supported:
+
+- groovy.java.home (`string` - sets a custom JDK path)
+- groovy.classpath (`string[]` - sets a custom classpath to include _.jar_ files)
+
 ## Build
 
 To build from the command line, run the following command:
@@ -33,3 +38,11 @@ java -jar groovy-language-server-all.jar
 ```
 
 Language server protocol messages are passed using standard I/O.
+
+## Editors and IDEs
+
+A sample language extension for Visual Studio Code is available in the _vscode-extension_ directory. There are no plans to release this extension to the VSCode Marketplace at this time.
+
+Instructions for setting up the language server in Sublime Text is available in the _sublime-text_ directory.
+
+Moonshine IDE natively provides a Grails project type that automatically configures the language server.