Added gitgutter plugin

vim/vimrc

@@ -1,3 +1,5 @@
+source ~/.vimrc.local
+
 " vim-plug installer
 if empty(glob('~/.vim/autoload/plug.vim'))
   silent !curl -fLo ~/.vim/autoload/plug.vim --create-dirs
@@ -18,6 +20,7 @@ Plug 'altercation/vim-colors-solarized'
 Plug 'craigemery/vim-autotag'
 Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
 Plug 'junegunn/fzf.vim'
+Plug 'airblade/vim-gitgutter'
 
 call plug#end()