First pass at switching image capture to Perl SDK
Initial refactoring of all the nova commands to use the perl sdk

Excludes the commands that are filtered on the private ip address
Multiple fixes to get image loading working
All nova commands now replaced with sdk calls.
Fixes to make image capture work
Updated readme
Instructions for installing Perl dependencies
Delete computer mapping based on computer ID only.
Improved error handling when instance fails to launch
Proper use of return statements in TryTiny blocks