Merge pull request #361 from techhat/ec2

Cleaning up old debug stuff from ec2 module
Merge pull request #364 from techhat/ec2

Add delvol_on_destroy functionality to ec2 profile
Merge pull request #365 from techhat/ec2

Add documentation for EC2-specific functionality
Merge pull request #366 from techhat/ec2

Resolve stacktrace from destroying protected instances
revert. fixed by @altoplano
Merge pull request #367 from seanchannel/develop

revert. fixed by @altoplano
Connecting newer docs to the index/TOC
Add direct avail_sizes function to ec2