Whitespace Fixes.

Removing trailing whitespace from files as I find it.
Update Completion submodule.

Pull in new changes to the zsh completions submodule.
Bump my zsh-git submodule to fix a bug on linux.

This patch fixes a bug where the value of $OSTYPE was compared to the
wrong expected value on Linux.  This would prevent proper use of git in
Linux environments.
Bump dircolors solarized to latest revision.