Add support for the vstest.console.exe unit test runner

[pvwichen]

What You Are Seeing?

Visual Studio 2012 and newer includes a newer unit test runner that is used for unit and coded UI tests. For more information, refer to: https://msdn.microsoft.com/en-us/library/jj155800.aspx

Also supports the ability to execute unit tests in a 64-bit assembly.

What is Expected?

The ability to execute unit and coded UI tests using the vstest.console.exe runner.
Example: VSTest("src/**bin/Release/*.Test.dll", new VSTestSettings { Logger = VsTestLogger.Trx });

What version of Cake are you using?

Version 0.11.0

Are you running on a 32 or 64 bit system?

64-bit system.

What environment are you running on? Windows? Linux? Mac?

Windows and Linux, although this runner would only apply to Windows currently.

Are you running on a CI Server? If so, which one?

Jenkins, Teamcity

[devlead]

fixed by #890