Add Undead where needed
Fix a bunch of lint warnings, incl: hopefully prevent stale Handlers.

Stale Handlers with associated SGTPuzzles instances might explain
some crashes if you squint at it, I suppose.

Conflicts:
	src/name/boyle/chris/sgtpuzzles/FilePicker.java
	src/name/boyle/chris/sgtpuzzles/SGTPuzzles.java
Previous WIP: Undead Androidification

Conflicts:
	jni/undead.c
Add unruly
Correct ABI for min version.
Move the rest of upstream into jni, to have some hope of having non-Android builds work
Add unruly icon
Bump version and target.
Fix and update docs