Mac (git): Add backup file
Mac (zsh): Change theme, remove extra spaces, single quotes

I changed the theme to garyblessington because it's short and
informative enough.

Some of the git aliases I had made had extra spaces at the end of them
for now reason. When I use the aliases, I already put a space after them.

The theme declaration string was in double quotes, contrary to the
standard I've set for aliases being single quotes.
Mac (tmux): Use tmuxline instead of tmux-powerline
Mac (tmux): Add tmuxline config file
Mac (vim): Update plugin directories

The vimrc committed already has the plugin declarations.
Mac (vim): Add plugins for files and git

I installed the 'tpope/vim-fugitive' plugin so that I could get the
branch name in the vim-airline.

I also installed 'kien/ctrlp.vim' so that I could more easily open up
files from the root directory of an app instead of constantly entering
specific directories that were closer to the files I wanted.
Mac (zsh): Nothing's changed :)
Mac (tmux): Copy paste improvements and window index

Now, I can copy and paste from tmux into my Mac's clipboard when I use
'y'.
Remove old osx directory