vim: add signify plugin

.gitmodules

@@ -74,3 +74,6 @@
 [submodule ".zsh/zsh-completions"]
 	path = .zsh/zsh-completions
 	url = https://github.com/zsh-users/zsh-completions.git
+[submodule "vim-signify"]
+	path = .vim/bundle/vim-signify
+	url = https://github.com/mhinz/vim-signify.git

.vimrc

@@ -184,6 +184,7 @@ set laststatus=2
 let g:airline_theme = 'powerlineish'
 let g:airline#extensions#tabline#enabled = 1
 let g:airline#extensions#tabline#fnamemod = ':t'
+let g:airline#extensions#hunks#non_zero_only = 1
 " only enable trailing whitespace checking
 let g:airline#extensions#whitespace#checks = [ 'trailing' ]
 let g:airline#extensions#wordcount#enabled = 0 " extremely slow on bigger files
@@ -212,6 +213,8 @@ let g:vim_markdown_math = 1
 " hexmode
 let g:hexmode_patterns = '*.bin,*.exe,*.dat,*.rom'
 
+" signify
+let g:signify_realtime = 1
 " }}}
 
 " vim:fdm=marker