git-receive-pack handler now sets USER environment variable to user logged on to client's browser (for Git hooks to work, authorization-related and maybe others)
Now shows the logged-on user name everywhere
Now fails git-receive-pack if the logged-on user is in the "limited readers" group
Now prohibits repository creation if the logged-on user is not in the "repo creators" group
Added BuildingAndDeployment.txt
Merge branch 'master' of https://github.com/maxim--s/WebGitNet into MoreUserAccessControl

Conflicts:
	WebGitNet/Views/Shared/_Layout.cshtml
Merge branch 'master' of https://github.com/maxim--s/WebGitNet