Fencing code samples and updating TOC link
Merge pull request #228 from jamiehannaford/contributing-guide

Fencing code samples and updating TOC link
Adding .gitignore for coverage reports
Testing edge conditions for apiversions
Removing duplication in extract methods
Adding test for edge case
Adding common extract function to root package
Adding more tests for floating IPs
Adding more tests for routers
Removing dead code
Removing unnecessary conditionals from block storage
Removing unnecessary conditionals from common exts
Removing unnecessary conditionals from compute service
Removing unnecessary conditionals from identity service
Adding common directory so that tests can re-use decorated mocks
Updating network URLs to use service client initialization
Updating port URLs to use service client initialization
Updating subnet URLs to use service client initialization
Updating api versions URLs to use service client initialization
Updating extensions URLs to use service client initialization