Client refactoring

- Implemented suggestions from AngularJS Style Guide by John Papa. See https://github.com/johnpapa/angularjs-styleguide.
- Fixed issue with pagination buttons not showing up with panelTableService.
- Renamed 'model object' to 'domain entity'.
Server: working on getting specimen groups that are in use.
Server: working on getting specimen groups that are in use.
Server: working on getting specimen groups that are in use.