git: Enable color.ui except when pager is active

I use tig as the pager, which does not interpet ascii color sequences
correctly. However, I still want color when doing small commands like
`git status -s` that don't use a pager.
tmux: Add script tmux-open-home
bashrc: Fix inclusion of git-prompt.sh on ArchLinux

ArchLinux installs git-prompt.sh to a location different than Fedora.
So, iterate over possible install locations and include the first one
found.
vim/xml: Move ftplugin/xml.vim -> after/ftplugin/xml.vim
tmux: set message-status-bg green -> brightgreen

When the terminal background is white, it's easier to read text on
brightgreen than green.
git-show-hash: Add script
ebuild-utils: Add scripts to commit or remove patches

ebuild-git-commit-patches: Commit all ebuild patches to git.
ebuild-rm-patches: Remove all patches from ebuild.