add alias for rspec to zeus plugin
added pj.plugin
Fix rbenv gems helper

Fixes gem versions with words (beta, pre) in the version or with
multiple installed versions not being highlighted, and compatibility
with GNU sed (related to robbyrussell/oh-my-zsh#1579).
Changing themes to use only extended ASCII characters.

Also changing color codes in 256 color theme.
Changing username color in simple theme.
Changing return code color and order of git status elements.
Adjusting syntax highlighting.
Changing gitmodules to use git instead of ssh/
Removing invalid flag in lib/git.zsh.
Merge branch 'upstream'
Merge branch 'pull_tmux_plugin'