settings: vimrc: Change mappings for :wall and :update


git-svn-id: https://subversion.assembla.com/svn/magicant/settings@339 9a5e03f8-c55e-0410-a490-9d27d325e308
settings: update gitcommit.vim for "git commit -v"

git-svn-id: https://subversion.assembla.com/svn/magicant/settings@340 9a5e03f8-c55e-0410-a490-9d27d325e308