Move FieldGroup to the fields package
Update app for API v3
Show collection UDF fields on the tree detail page

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Style cleanups - Fixed margins and added borders between fields

This style cleanup required changing how fields are rendered slightly
Without passing in a View's parent when it is being inflated, the root View's
layout parameters don't take affect, which made styling the tree detail page
properly impossible.

The parent ViewGroups are now properly passed down to everywhere we inflate
layouts. (Though note we pass false for the 'addToRoot' parameter, because we
do that explicitly later).
Only show 3 collection UDF fields at a time, with a load more button
Code cleanups

- Use Plot, not Model, when possible
- Make method private
- Reformat code
- Remove lint
Merge pull request #154 from maurizi/collection-udf-in-view-mode

Show collection UDFs in view mode