tree 0a7a2c117fba00fb9d8072ae51f2cd2d58abac88
parent 309260ee593aa3f209510ae6bf137f9b75e2498b
author Chris Wren <cwren@android.com> 1386865209 -0500
committer Chris Wren <cwren@android.com> 1387220185 -0500

Add auto-detection of payload type

update docs and error messages
use png extension of files, since they are
don't create image files by default
use input filename for image files

Change-Id: I3e9c31a1de02976432d3f39cf82b5403055d620a