added red background color for root

I use oh-my-zsh with powerline theme for normal user and root and when background color is the same in both cases it could be misleading. I know, that red background is used for ssh connections, but we can talk about it.
Changed code points of powerline glyphs
Merge pull request #8 from illuminatis/patch-1

added red background color for root
Merge pull request #13 from mkraemer/new-code-points

Changed code points of powerline glyphs
Updated README
Updated theme with a brand new design
Updated preview
Merge remote-tracking branch 'upstream/master'

Conflicts:
	powerline.zsh-theme