downgrade fakefs to be 1.8.7 compatible
reenable email notifications since I missed the build failures
Merge pull request #1260 from heroku/rm-ocra

remove appveyor and gemnasium badges
Merge pull request #1259 from heroku/fakefs-187

downgrade fakefs to fix ruby 1.8.7 test failures
cleaned up README.md

Added an icon
Removed bit on development (anyone developing on it would need to know more than just that).
Removed table describing various installation types since the toolbelt website will sniff the user agent (or provides the same information).
Updated link to always go to homepage
New dev center link (goes to the same place)
cleaned up release code