Python to 2.7.12 with openssl support & readline to 6.3 to fix the undefined symbol: rl_signal_event_hook problem

I'm bad with my reverts because I'm reverting through github since I'm on my virgin chromebook

Reverting back the changes I was trying for pull 178 in the master repo

Recently formattet my chromebook pixel and wanted to try everyone's change of install.sh so I've merged pull https://github.com/skycocker/chromebrew/pull/176 into mine to try it.

add packages/yasm.rb

add fish package

Libevent and tmux fixes

Fix url in installation to avoid 301 redirects