Update russian translation

In russian 'репозитарий' means a self-regulatory organization of professional participants of the securities market.
'Репозиторий'  is a storage location from which software packages may be retrieved
https://ru.wikipedia.org/wiki/%D0%A0%D0%B5%D0%BF%D0%BE%D0%B7%D0%B8%D1%82%D0%BE%D1%80%D0%B8%D0%B9

For example in the git-book it referred to 'git репозиторий'
http://git-scm.com/book/ru/%D0%9E%D1%81%D0%BD%D0%BE%D0%B2%D1%8B-Git-%D0%A1%D0%BE%D0%B7%D0%B4%D0%B0%D0%BD%D0%B8%D0%B5-Git-%D1%80%D0%B5%D0%BF%D0%BE%D0%B7%D0%B8%D1%82%D0%BE%D1%80%D0%B8%D1%8F