Fix UMASK checking in .gitoliterc

Grammar fix after creating a project

API blob contents

Fix #1009 Replace all special characters in user's identity

cleanup the wording of the notification footer

Break up links with nested formating (rebased)

As per request: Post-receive hook should be owned by gitlab user, not git.

Potential solution for current `rake gitlab:app:backup_restore` issues.

Modified the `repo_dump` and `repo_restore` rake tasks to properly dump and restore repositories based on their `path` rather than their (project) `name`. The project name can be uppercase and may contain spaces. This caused the repository to be restored as a different `path` that it was initially created as, thus, breaking the `git remote` and the web interface can no longer detect the repository either because it searches by `path` and not by `name`. Also, when restoring the permissions are incorrect making it impossible to push new commits to the remote repository. So now on success it'll set the correct permissions (but requires that the `gitlab` user has `sudo` privileges, or this task must be executed as root).