Update vim-improvements.vundle

This removes a redundant Bundle that already appears on line 9. This was throwing warnings for me whenever I started macvim.
Merge pull request #470 from martco/patch-1

Update vim-improvements.vundle
Decided disabling arrow keys was hurting new people too much
Remove duplicated plugin
Fix Ag functions

I believe this is what is intended? It was not working for me like it was...
Merge pull request #474 from lfilho/patch-1

Fix Ag functions
Remove tagbar settings [Fix #464]
neocomplete: update settings
Merge pull request #485 from maletor/neocomplete_settings

neocomplete: update settings
zsh aliases to show/hide hidden files in Finder
Unset ctrlp_user_command prior to redefinition
Fix for iTerm themes install on Mavericks

Mavericks cache preferences and overwrites defaults from cache, not
installing it properly. Reading it after install updates the cache with
new values.
Merge pull request #499 from giorni/iterm-plist

Fix for iTerm themes install on Mavericks
Merge pull request #498 from blackxored/ctrlp-unlet

Unset ctrlp_user_command prior to redefinition.
[FIX] fixed an error in vim settings
[fixes #501] Fix ag string typo。
Merge pull request #503 from rkowalewski/master

Fix in vim settings
Merge pull request #502 from keikun17/master

[fixes #501] Fix ag string typo。
Merge pull request #496 from Vijar/master

zsh aliases to show/hide hidden files in Finder
fix dark mode in vim+iterm2