Added multiple-cursors plugin

Change-Id: If48be0e27cb5680ad1f7778046f8f9f139ac4964
Replaced TagList by Tagbar

Change-Id: I9cf9c96d6f3b56f9a216b2222fca7682a35acd42
Added more Powerline configuration to other plugins

Change-Id: If34a097b224077a863a3bfd3fa353ba0361ae448
Added a map to search on the current git repository with grep

Change-Id: I9a79e2abbc55f5fc011ed5b18d49ee7c72efe597