Added vim-commentary and updarted the plugins.

commentary:
Comment stuff out.  Use `gcc` to comment out a line (takes a count),
`gc` to comment out the target of a motion (for example, `gcap` to
comment out a paragraph), and `gc` in visual mode to comment out the
selection.  That's it.

sources_non_forked/vim-airline/autoload/airline/extensions/branch.vim

@@ -55,7 +55,7 @@ endfunction
 function! s:check_in_path()
   if !exists('b:airline_branch_path')
     let root = get(b:, 'git_dir', get(b:, 'mercurial_dir', ''))
-    let bufferpath = resolve(fnamemodify(expand('%'), ':p:h'))
+    let bufferpath = resolve(fnamemodify(expand('%'), ':p'))
 
     if !filereadable(root) "not a file
       " if .git is a directory, it's the old submodule format

sources_non_forked/vim-airline/autoload/airline/extensions/tabline.vim

@@ -31,6 +31,7 @@ function! airline#extensions#tabline#init(ext)
 
   autocmd User AirlineToggledOn call s:toggle_on()
   autocmd User AirlineToggledOff call s:toggle_off()
+  autocmd BufDelete * let s:current_bufnr = -1
 
   call s:toggle_on()
   call a:ext.add_theme_func('airline#extensions#tabline#load_theme')

sources_non_forked/vim-airline/autoload/airline/extensions/tagbar.vim

@@ -23,9 +23,15 @@ function! airline#extensions#tagbar#inactive_apply(...)
   endif
 endfunction
 
+let s:airline_tagbar_last_lookup_time = 0
+let s:airline_tagbar_last_lookup_val = ''
 function! airline#extensions#tagbar#currenttag()
   if get(w:, 'airline_active', 0)
-    return tagbar#currenttag('%s', '', s:flags)
+    if s:airline_tagbar_last_lookup_time != localtime()
+      let s:airline_tagbar_last_lookup_val = tagbar#currenttag('%s', '', s:flags)
+      let s:airline_tagbar_last_lookup_time = localtime()
+    endif
+    return s:airline_tagbar_last_lookup_val
   endif
   return ''
 endfunction