Added a missing accessor to Network class.
Implemented delete() method for Volume class.
Implemented grant() method for User class.
Updated grant() method of User to set multiple billing codes and groups.
Merge branch 'master' of github.com:enStratus/mixcoatl
Added a function to assign cloud subscription to account.
fixed vlan problem. fixed indentation.
fixed a problem caused by missing cloud subscription ID.
Updated BillingCode to support adding new billing code.
Updated to support password setting for new user.
Updated to set multiple budget codes for new user.
Integrated API tools into mixcoatl.
Merge pull request #1 from sean-kang/api-merge

Integrated API tools into mixcoatl.
Merge branch 'master' of github.com:enStratus/mixcoatl
Updated usage examples for dcm-get.py
Merge pull request #34 from sean-kang/master

Merge the latest development branch into master branch