Rename tables
Rename files and classes
Merge pull request #204 from axsh/rename-ip-range-tables

Rename ip range tables
Add a tag to IpRange
Add one to many relation spec
Fix ip allocation
Merge pull request #205 from axsh/fix-ip-allocation

Fix ip allocation
Use ActiveNetworks and ActiveRouteLinks helper modules for route manager.
Merge pull request #206 from axsh/feature-ip-range-group-api-spec

Feature ip range group api spec
Merge remote branch 'origin/master' into refactor-other-managers