dimagi/core-hq — pull request #395 by dannyroberts (2012-12-17 20:51:20+00:00)
Title: Patch save for vellum

* Add diff-match-patch js lib
* Add CryptoJS SHA1 js lib
* Add patch_xform view that applies a patch to the current xform xml, checking the SHA1 hash first to make sure it's valid to apply

This fixes http://manage.dimagi.com/default.asp?48983, and relies on an updated commcare-hq requirements file.