Add generic describer helper functions and implement it for keypair
make instances generic, fix its tests, add required params to instance attributes
Generificy images
Add security group describer, still need to clean up security groups
Rename files to suit common naming
Merge branch 'master' into generic-describers

* master:
  Run through auutopep8
  Extend images / instances tests

Conflicts:
	ec2stack/providers/cloudstack/images.py
	ec2stack/providers/cloudstack/instances.py
	tests/images_tests.py
	tests/instances_tests.py
Add describe zones
add more info to instance output
clean up secgroups
Add security group tests
extent instance tests
format test data
Merge remote-tracking branch 'origin/master' into generic-describers

* origin/master:
  Add more info to volume responses
  Test volumes / zones

Conflicts:
	ec2stack/providers/cloudstack/zones.py
Fix merge descriptancies
Merge pull request #40 from imduffy15/generic-describers

Generic describers