- Added the juju-pdb plugin for being used with `charmhelpers/contrib/python/debug`
  - Users must run the set_trace() call before use this plugin, then invoke this by running:
	$ juju pdb unit/0 4444

- Modified pprint plugin to use utils file.
- Added utils file to group some plugin common methods.

Modified file to use utils.py methods

Removed author field from utils.py