More client content.

- Refactored panel code into directives.
- More work on specimen link type form.
- Using Underscore.js now
- Fixed study panel directives.
- Fixed expand / collapse button for panels.
- Refactored panel directives.
- Fixed forms when selecting a specimen group or annotation type. The ID is selected correctly now.
- Removed name and units from org.biobank.infrastructure.CollectionEventTypeSpecimenGroupData.
- Removed name from org.biobank.infrastructure.AnnotationTypeData.