FindBugs Cleanup

Fixed a covariant equals bug (overrode equals(Object) and pointed it at
the Equals(Hashcode))
FindBugs Cleanup - The Sequel

Potentially stopped an NPE and an odd comparison from failing for
negative numbers.  Also flagged an apparent infinite loop.  I don't see
that method being called, and in fact, it is overridden a lot.
Shouldn't LayerWrapper be abstract?
Initial Spanish Commit

Still all English at this point
First round of spanish words
Merge remote-tracking branch 'origin/story' into story_kevin

Conflicts:
	core/src/main/java/tuxkids/tuxblocks/core/utils/HashCode.java
	core/src/main/java/tuxkids/tuxblocks/core/utils/persist/PersistUtils.java
Fixed merge artifacts
Merge branch 'story' of https://github.com/thomaswp/tuxblocks into story