Improve readability of help output

This does a couple things I find very helpful for help output.  

1. It increases the column widths of the commands from 20 to 40.   I find 20 to be entirely unreadable when reading acquia and pantheon long commands.

2. It moves the aliases into their own column so they are easier to quickly read.  I feel readability is becoming a larger issue since now there are about 250 commands printed when you have both acquia and pantheon commands included.

Hopefully you also find this helpful.

Enjoy.

Dan