Cleaned up and enhanced readme.

Finishing touches.

Make the layout more consistent.

Merge branch 'team-and-group-descriptions' of https://github.com/Undev/gitlabhq into Undev-team-and-group-descriptions

Conflicts:
	db/schema.rb

Distorted lines in `diff`

docs improvement

Merge branch 'link-to-issue-tracker' of https://github.com/Undev/gitlabhq into Undev-link-to-issue-tracker

Conflicts:
	Gemfile.lock

fix one of the possible causes of build failures

Update binding_of_caller to v0.7.1