Revert "update vimrc, set silent! to autocmd when writebufpre"

This reverts commit d02bb6539c1fe082f5b24506941105b810dd6126.

Revert to the commit before update neocomplcache.
Revert "Revert "update vimrc, set silent! to autocmd when writebufpre""

This reverts commit 5dbaec477288f2f50abbc98a1bc981240966b692.

Want to revert until before the plugin neocomplcache is updated.
Revert "update vimrc, let g:neocomplcache_enable_smart_case = 0"

This reverts commit c989875c40457d59499e9301f7c825edf2025e1a.
Revert "remove plugin, Colorizer"

This reverts commit 851524a545706b44412c33ee4e1dc27ba1f74555.
Revert "update plugin, neocomplcache"

This reverts commit 35af8254c36597bfc9769977a3e3c9d416aba5ba.

Cancel the update of neocomplcache