Adding psake build scripts.

Updated appveyor to build CI to dev feed and release builds to nuget feed.
Updated solution and projects to support .NET Core.

Author: Justin Skiles

appveyor.yml

@@ -1,32 +1,37 @@
-version: 3.1.0.{build}
+version: '{build}'  
 
-branches:
+pull_requests:  
+  do_not_increment_build_number: true
+  
+branches:  
   only:
-    - master
-
-assembly_info:
-  patch: true
-  file: AssemblyInfo.*
-  assembly_version: "{version}"
-  assembly_file_version: "{version}"
-  assembly_informational_version: "{version}"
-
-configuration: Release
-
-build:
-  project: src\SteamWebAPI2.sln
-  publish_nuget: true
-  include_nuget_references: true
+  - master
 
-cache:
-  - src\packages -> **\packages.config
+nuget:  
+  disable_publish_on_pr: true
 
-before_build:
-  - cmd: nuget restore src\SteamWebAPI2.sln
+build_script:
+  - cmd: .\psake.bat ci
+  
+test: off  
+
+artifacts:  
+  - path: .\artifacts\**\*.nupkg
+    name: NuGet
 
 deploy:
   - provider: NuGet
+    server: https://www.myget.org/F/babelshift-ci/api/v2/package
+    api_key:
+      secure: zI5gnqOnLVuIzNHVG1eiCpi5mEsT1i6AvwOHwIIm27NOURZFnCHhwG3SE49f0f88
+    skip_symbols: true
+    on:
+      branch: master
+    
+  - provider: NuGet
+    name: production
     api_key:
       secure: vIHuOdB4aYJEqNACb3jjCg3m/qZLqpwYlruu8J0BOiX81lRrmussVEUqiWRBTrRQ
-    skip_symbols: false
-    artifact: /.*\.nupkg/
+    on:
+      branch: master
+      appveyor_repo_tag: true