Updates to vimrc.

 - Add less section
 - Update filename commandline completion
Remove zencoding plugin (moved).
Update AsyncCommand plugin.
Update MatchTag plugin.
Update bufexplorer plugin.
Update coffee-script plugin.
Update css-color plugin.
Update ctrlp plugin.
Update delimitMate plugin.
Update fugitive plugin.
Update indent-guides plugin.
Update lustyjuggler plugin.
Update ragtag plugin.
Update snipMate plugin.
Update surround plugin.
Update syntastic plugin.
Update tabular plugin.
Update tagbar plugin.
Update tlib plugin.
Update vcscommand plugin.