Add GollumWiki#empty? method
Consistent naming to make difference between clicking on profile pic and profile settings clear.
Skip rather than fail empty wikis during backup
Merge branch 'consistent-naming-of-user-and-profile-page' of /home/git/repositories/gitlab/gitlabhq
Merge branch 'wiki_backup' of /home/git/repositories/gitlab/gitlabhq
Merge pull request #87 from gitlabhq/master

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