Added useful comment and cleaned up Travis build file

Author: asbjornu

.travis.yml

@@ -9,5 +9,8 @@ install:
   - mono .nuget/nuget.exe restore src/GitVersion.sln -Verbosity detailed
   - mono .nuget/nuget.exe install NUnit.Runners -Version 3.2.1 -OutputDirectory ./src/packages
 script:
-  - xbuild "./src/GitVersion.sln" /property:Configuration="Debug" /verbosity:detailed
-  - mono --debug --runtime=v4.0.30319 ./src/packages/NUnit.ConsoleRunner.3.2.1/tools/nunit3-console.exe ./src/GitVersionTask.Tests/bin/Debug/GitVersionTask.Tests.dll ./src/GitVersionCore.Tests/bin/Debug/GitVersionCore.Tests.dll ./src/GitVersionTask.Tests/bin/Debug/GitVersionTask.Tests.dll ./src/GitVersionExe.Tests/bin/Debug/GitVersionExe.Tests.dll --where "cat != NoMono" --noresult
+  - xbuild ./src/GitVersion.sln /property:Configuration="Debug" /verbosity:detailed
+  - mono ./src/packages/NUnit.ConsoleRunner.3.2.1/tools/nunit3-console.exe ./src/GitVersionTask.Tests/bin/Debug/GitVersionTask.Tests.dll ./src/GitVersionCore.Tests/bin/Debug/GitVersionCore.Tests.dll ./src/GitVersionTask.Tests/bin/Debug/GitVersionTask.Tests.dll ./src/GitVersionExe.Tests/bin/Debug/GitVersionExe.Tests.dll --where "cat != NoMono" --noresult
+
+ # To run a clean build with Mono, executing just one test, do:
+ # xbuild ./src/GitVersion.sln /t:Clean /verbosity:quiet && xbuild ./src/GitVersion.sln /property:Configuration="Debug" /verbosity:quiet && mono ./src/packages/NUnit.ConsoleRunner.3.2.1/tools/nunit3-console.exe ./src/GitVersionTask.Tests/bin/Debug/GitVersionTask.Tests.dll ./src/GitVersionCore.Tests/bin/Debug/GitVersionCore.Tests.dll ./src/GitVersionTask.Tests/bin/Debug/GitVersionTask.Tests.dll ./src/GitVersionExe.Tests/bin/Debug/GitVersionExe.Tests.dll --noresult --where "test =~ /TheNameOfTheTest/"