Switch to using EverTrue's Gemfury, add back Rubygems as source
Fix Gemspec to properly set file list variables

Have to use double-quotes for newline characters, or they're interpreted
literally, instead of rendering to newlines
Remove unnecessary `require` declarations in Rakefile

Requiring an entire Gem will also require all additional classes within it
Add gemfury to ensure bundle installs all needed gems
Add gemfury/command back in to fix error
Bump to v1.1.0 to include knife-ec2 v0.8.0 changes