add wrap movement in visual mode, add supertab context completion

Turns out supertab option is really good for filenames.

vim/vimrc

@@ -272,6 +272,11 @@ nnoremap <silent> <expr> k ScreenMovement("k")
 nnoremap <silent> <expr> 0 ScreenMovement("0")
 nnoremap <silent> <expr> ^ ScreenMovement("^")
 nnoremap <silent> <expr> $ ScreenMovement("$")
+vnoremap <silent> <expr> j ScreenMovement("j")
+vnoremap <silent> <expr> k ScreenMovement("k")
+vnoremap <silent> <expr> 0 ScreenMovement("0")
+vnoremap <silent> <expr> ^ ScreenMovement("^")
+vnoremap <silent> <expr> $ ScreenMovement("$")
 
 
 """"""""
@@ -307,6 +312,10 @@ let g:indent_guides_enable_on_vim_startup = 1
 let g:indent_guides_auto_colors = 0
 
 
+""""""""" SuperTab
+let g:SuperTabDefaultCompletionType = 'context'
+
+
 """"""""" Syntastic
 let g:syntastic_auto_jump = 1