Updated rangy from 1.2.2 to 1.3alpha.772

This gets us some new functionality, mainly the ability to get a position
from a point on screen.

Changes:

* Updated core and position
* Removed unused modules

Change-Id: I2145fe549c975fdbbcd7dfcf144afb26509d0050
Merge "Updated rangy from 1.2.2 to 1.3alpha.772"