Added abolish, clang_complete, ctrlp, nerdtree, snipmate

List of submodules added:
git://github.com/Rip-Rip/clang_complete
git://github.com/tpope/vim-abolish.git
git://github.com/tomtom/tlib_vim.git
git://github.com/scrooloose/nerdtree.git
git://github.com/kien/ctrlp.vim.git
git://github.com/garbas/vim-snipmate.git
git://github.com/MarcWeber/vim-addon-mw-utils.git