Start implementing Position, set todos
Start moving to new deep positions
Finish validation for new deep position
Implement ordering of afters

In the process, make the distinction between a
QuestionPositionDescription's name and the name of the question it
references.
Factorize some checks, and check for description name unicity
Set bonus flag on pages and pageGroups
Start propagating bonus stuff to PageActivity
Implement usage of bonus positions in PageActivity
Switch to dev grammar-v3 for testing
Add todo (issue #178)
Change defaults for Position
Fix NullPointerException
Fix Location de-serialization
Adapt dialog text if skipping bonus means finishing
Use the skipText
Add a NodeFactory
Fix NullPointerException
Starting the first Sync is done by the dashboard, not
FirstLaunchActivity
Fix "afters" map building and injection
Switch to JsonView-based serializations