Remove MVC 3 support

Author: Daniel15

build.proj

@@ -24,7 +24,6 @@ of patent rights can be found in the PATENTS file in the same directory.
 		<PackageAssemblies Include="React.Core" />
 		<PackageAssemblies Include="React.Web" />
 		<PackageAssemblies Include="React.Web.Mvc4" />
-		<PackageAssemblies Include="React.Web.Mvc3" />
 		<PackageAssemblies Include="System.Web.Optimization.React" />
 		<PackageAssemblies Include="Cassette.React" />
 		<PackageAssemblies Include="React.MSBuild" />

lib/Mvc3/System.Web.Mvc.dll

@@ -14,7 +14,6 @@ packages available:
    like React.Mvc4.
  * [React.Web.Mvc4](https://www.nuget.org/packages/React.Web.Mvc4/) - Integration with ASP.NET MVC 4 and 5.
  * [React.AspNet](https://www.nuget.org/packages/React.AspNet/) - Integration with ASP.NET 5 (vNext), including ASP.NET MVC 6. [Learn more about ASP.NET 5 support](/getting-started/aspnet5.html)
- * [React.Web.Mvc3](https://www.nuget.org/packages/React.Web.Mvc3/) - Integration with ASP.NET MVC 3.
  * [Cassette.React](https://www.nuget.org/packages/Cassette.React/) - Integration with [Cassette](http://getcassette.net/). The recommended way to combine and minify your JavaScript.
  * [System.Web.Optimization.React](https://www.nuget.org/packages/System.Web.Optimization.React/) - Integration with
    [ASP.NET Bundling and Minification](http://www.asp.net/mvc/tutorials/mvc-4/bundling-and-minification).

lib/Mvc3/System.Web.Razor.dll

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 14
-VisualStudioVersion = 14.0.25123.0
+VisualStudioVersion = 14.0.25420.1
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Tests", "Tests", "{F567B25C-E869-4C93-9C96-077761250F87}"
 EndProject
@@ -47,8 +47,6 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "React.Sample.Cassette", "Re
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Cassette.React", "Cassette.React\Cassette.React.csproj", "{F591F1E8-3D6B-494A-B72A-152FCCA6210D}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "React.Web.Mvc3", "React.Web.Mvc3\React.Web.Mvc3.csproj", "{6B05AF58-BA85-45A9-97AE-88B6B21317D7}"
-EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "React.MSBuild", "React.MSBuild\React.MSBuild.csproj", "{AF531A37-B93F-4113-9C2C-4DB28064B926}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "React.Sample.Owin", "React.Sample.Owin\React.Sample.Owin.csproj", "{84C5EB9D-FB4E-44C3-91C4-2F2393C58B39}"
@@ -108,10 +106,6 @@ Global
 		{F591F1E8-3D6B-494A-B72A-152FCCA6210D}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{F591F1E8-3D6B-494A-B72A-152FCCA6210D}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{F591F1E8-3D6B-494A-B72A-152FCCA6210D}.Release|Any CPU.Build.0 = Release|Any CPU
-		{6B05AF58-BA85-45A9-97AE-88B6B21317D7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{6B05AF58-BA85-45A9-97AE-88B6B21317D7}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{6B05AF58-BA85-45A9-97AE-88B6B21317D7}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{6B05AF58-BA85-45A9-97AE-88B6B21317D7}.Release|Any CPU.Build.0 = Release|Any CPU
 		{AF531A37-B93F-4113-9C2C-4DB28064B926}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{AF531A37-B93F-4113-9C2C-4DB28064B926}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{AF531A37-B93F-4113-9C2C-4DB28064B926}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -153,7 +147,6 @@ Global
 		{889CEF81-75D6-4BAB-8E2C-B64B7CA97C77} = {681C45FB-103C-48BC-B992-20C5B6B78F92}
 		{F1EB6834-80A5-411C-90FD-CECC05715A10} = {A51CE5B6-294F-4D39-B32B-BF08DAF9B40B}
 		{F591F1E8-3D6B-494A-B72A-152FCCA6210D} = {681C45FB-103C-48BC-B992-20C5B6B78F92}
-		{6B05AF58-BA85-45A9-97AE-88B6B21317D7} = {681C45FB-103C-48BC-B992-20C5B6B78F92}
 		{AF531A37-B93F-4113-9C2C-4DB28064B926} = {681C45FB-103C-48BC-B992-20C5B6B78F92}
 		{84C5EB9D-FB4E-44C3-91C4-2F2393C58B39} = {A51CE5B6-294F-4D39-B32B-BF08DAF9B40B}
 		{C3BF8D49-B7CC-4D7F-B0F0-A94347C595EA} = {681C45FB-103C-48BC-B992-20C5B6B78F92}