drop GoboRootless-specific config
drop Houdini-specific config
drop more GoboRootless-specific config
drop TexLive-specific config
drop nodejs-specific config
drop Haxe-specific config
drop django-specific config
drop ruby-specific config
change default git-push mode

simple did not exist until git 1.7.11, and sometimes I need to deploy
dotfiles on older machines.
install script

I'm tired of creating the symlinks every time I clone dotfiles.