Revert "vimrc: use evening colorscheme"

This reverts commit 975ebe14a6220912d6e9f661ddd69b3fa13f80a0.

This looks ugly in urxvt-256color in Ubuntu.
add X clipboard integration to urxvt
gitconfig: fix sync alias for git 1.8.0+

It also no longer implies --all, as this is undesirable when multiple
remotes have different tags.