Merge branch 'BuildServerIntegration' into gitextensions_PombeirP_BuildServerIntegration
Merge remote-tracking branch 'gitextensions/PombeirP/BuildServerIntegration' into gitextensions_PombeirP_BuildServerIntegration
Cleanup and fix relative paths to Plugins\BuildServerIntegration\TeamCityIntegration.
Adapt sln files for new folder structure.