Add support for msbuild.exe v12.0 to the msbuild task

[icnocop]

I would like to be able to use the msbuild task to build Visual Studio 2013 solutions and projects.

Currently, specifying:

<property name="nant.settings.currentframework" value="net-4.0"/>
<msbuild
  project="C:\Test\Test.sln"
  target="Build"
  verbosity="Detailed">
  <property name="Configuration" value="Debug" />
  <property name="Platform" value="Mixed Platforms" />
</msbuild>

Will execute msbuild.exe from "C:\Windows\Microsoft.NET\Framework\v4.0.30319".

With Visual Studio 2013, the path to msbuild.exe has changed.
See "What's New in MSBuild 12.0" here: http://msdn.microsoft.com/en-us/library/hh162058.aspx
MSBuild is now installed directly under %ProgramFiles%—for example, in C:\Program Files\MSBuild.

For example, for Visual Studio 2013/MSBuild 12.0, "C:\Program Files (x86)\MSBuild\12.0\Bin\MSBuild.exe" should be used.

Thank you.

[danielcaldwell]

+1

[FrancoisBeaune]

+1

[ruaanviljoen]

+1 for MSBuild 12 and higher