Add message that repes_path should be real path

In the main gitlab config there is a message that this should be the real path, meaning it looks like it can be the symlinked path in this config, experience shows this is not the case.
Regex used in rm-key command is too lax

Basically the issue is that 'gitlab-shell rm-key key-2' removes all keys that match "key-2" pattern.
"key-20", "key-25", etc.
This change makes the regex used in the sed command more strict.
Merge pull request #51 from max-krasnyansky/rm-key-fix

Regex used in rm-key command is too lax
Fix tests and version up to 1.4.0
Merge pull request #49 from mcfedr/patch-1

Add message that repes_path should be real path