plugin: Add sideways.vim

Author: Masafumi Yokoyama

leader.vim

@@ -59,3 +59,8 @@ map <leader>cs <plug>(operator-decamelize)
 
 " kana/vim-altr
 nmap <Leader>a  <Plug>(altr-forward)
+
+" AndrewRadev/sideways.vim
+" to move function arguments (and other delimited-by-something items) left and right.
+nnoremap <Leader>hh :SidewaysLeft<CR>
+nnoremap <Leader>ll :SidewaysRight<CR>

plugin.vim

@@ -61,6 +61,7 @@ if dein#load_state(s:dein_dir)
   call dein#add('kana/vim-operator-user')
   call dein#add('tyru/operator-camelize.vim')
   call dein#add('kana/vim-altr')
+  call dein#add('AndrewRadev/sideways.vim')
 
   " buffer
   call dein#add('jlanzarotta/bufexplorer')