Merge pull request #754 from blueyed/hunks-support-quickfixsigns

Support for quickfixsigns in hunks extension

doc/airline.txt

@@ -358,6 +358,7 @@ csv.vim <https://github.com/chrisbra/csv.vim>
 vim-gitgutter <https://github.com/airblade/vim-gitgutter>
 vim-signify <https://github.com/mhinz/vim-signify>
 changesPlugin <https://github.com/chrisbra/changesPlugin>
+quickfixsigns <https://github.com/tomtom/quickfixsigns_vim>
 
 * enable/disable showing a summary of changed hunks under source control. >
   let g:airline#extensions#hunks#enabled = 1