Merge pull request #310 from hssm/libanki-cleanup-update-2.0.25

Move all constants into a new Consts.java file to match consts.py
Update Sched.java up to Anki 2.0.25.

Includes these commits:
- make sure we reset odue when rescheduling as new (dae/anki ae8074e)
- automatically remove from filtered deck before reschedule  (dae/anki 19b1446)
- increase filtered deck size limit to 99999 (dae/anki 96eeacb)