Ports Cake to .NET Core.

This commit changes a lot of the interals in Cake to
allow it to run on the CoreCLR.

Closes #1015

.gitignore

@@ -4,10 +4,21 @@
 [Tt]emp/
 [Ll]ib/
 [Pp]ackages/
-/[Bb]uild/
 /[Aa]rtifacts/
+/[Tt]ools/
 *.sln.ide/
 
+# .NET CLI
+/.dotnet/
+dotnet-install.sh*
+/.packages/
+
+# Visual Studio
+.vs/
+.vscode/
+launchSettings.json
+project.lock.json
+
 # Build related
 build-results/
 tools/Cake/

.travis.yml

@@ -1,10 +1,34 @@
 language: csharp
-script:
-  - ./build.sh
 os:
-  - linux
   - osx
+  - linux
+
+# .NET CLI require Ubuntu 14.04
+sudo: required
+dist: trusty
+addons:
+  apt:
+    packages: 
+    - gettext
+    - libcurl4-openssl-dev
+    - libicu-dev
+    - libssl-dev
+    - libunwind8
+
+# .NET CLI require OSX 10.10
+osx_image: xcode7.1
+before_install:  
+  - if test "$TRAVIS_OS_NAME" == "osx"; then brew update; brew install openssl; ln -s /usr/local/opt/openssl/lib/libcrypto.1.0.0.dylib /usr/local/lib/; ln -s /usr/local/opt/openssl/lib/libssl.1.0.0.dylib /usr/local/lib/; fi
+
+mono:  
+  - 4.2.3
+
+script:
+  - ./build.sh --verbosity diagnostic
+
 cache:
   directories:
-    - src/packages
-    - tools
+    - .packages
+    - tools/Addins
+    - tools/gitreleasemanager
+    - tools/GitVersion.CommandLine

appveyor.yml

@@ -21,5 +21,4 @@ branches:
 
 # Build cache
 cache:
-- src\packages -> src\**\packages.config
-- tools -> build.cake, tools\packages.config
+- tools -> build.cake

bitbucket-pipelines.yml

@@ -1,8 +1,9 @@
 # Cake Bitbucket Pipeline
-image: devlead/pipeline-mono
+image: devlead/bitbucket-pipelines-dotnet
 
 pipelines:
   default:
     - step:
         script:
-          - ./build.sh
+          - ln -s /opt/dotnet .dotnet
+          - ./build.sh -t "Run-Unit-Tests"