Update Nini package to a version targeting Client Profile.
Add command to preinstall nuget packages on build script.
Merge remote-tracking branch 'gitextensions-pombeiro/BuildServerIntegration-plugin' into BuildServerIntegration-plugin
Add command to preinstall nuget packages on build script.
Merge remote-tracking branch 'gitextensions-pombeiro/all' into all
Merge branch 'BackgroundFetchPlugin' into all
Merge branch 'BuildServerIntegration-plugin' into all

Conflicts:
	Setup/BuildInstallers.VS2012.cmd
	Setup/BuildInstallers.cmd