Jails and Plugins work.

- Move NullMountPoint from plugins to jails and associated references

- Use warden macros instead of magic words

- Add 'storage' and 'delete' options to jail datagrid

- Move jail type to advanced fields on jail creation form

- Default to pluginjail on jail creation

- Start jails when created

- Comment out NullMountPoint code until properly implemented with new
  jail model

- Remove references to PluginsJail model and associated dead code

- Add URL refrences for storage and delete jail views

- Add jail storage view to jail views

- Fix window response to jail start, stop and delete options

- Remove notifier methods that used single plugins jail model code

- Modify notifier methods that are needed with new multi jail code

- Remove notifier and plugin methods and forms for dealing with jail PBI
  since it's no longer necessary to use a jail PBI

- Fix warden jail startup to write to /dev/tty since it was hanging the
  gui

- Added generic icons for jail delete and storage buttons

- Added null mount point migration to remove from plugins

- Added plugins jail migration to services to remove old plugins jail
  model

- Added storage template file for jails to add storage to a jail