Provides support for incremental model updates.

Notes:
Turned back on modeling for created devices to see if this is resolved in
4.2.4.

When the WinRS datasource was updated all templates were reset. This will
be fixed next push.
Update to UI

Note:
During renaming I missed the sub-component panel updates.
Template updates to Server/Microsoft device class.
Merge pull request #62 from zenoss/feature/cluster-node-update

Incremental modeling and template updates.