Handle situation where there is not yet a .options file for the Build Server.
Merge remote-tracking branch 'gitextensions-pombeiro/BuildServerIntegration-plugin' into BuildServerIntegration-plugin
Merge remote-tracking branch 'gitextensions-pombeiro/BackgroundFetchPlugin' into BackgroundFetchPlugin
Add support for guest access to TeamCity.
"Set version" Python script added
Promote IsRunningGitProcess() method to IGitModule interface.
GetFullBranchName moved from GitModule to GitCommandHelpers

Commit renamed to CommitHelper
Ensure the background fetching is done on a worker thread so as to not block the UI.
Ensure plugins are given a chance to unload when the app is closed.
Removed some code duplication
Introduce IBuildServerCredentials. Fix threading issue of credentials form.
Merge remote-tracking branch 'gitextensions/master' into BuildServerIntegration-plugin
Merge remote-tracking branch 'gitextensions/master' into BackgroundFetchPlugin
Merge remote-tracking branch 'gitextensions-pombeiro/all' into all
Merge branch 'BackgroundFetchPlugin' into all

Conflicts:
	Setup/Product.wxs
Merge branch 'BuildServerIntegration-plugin' into all