refactoring sms parsing and stock action definiton. VERY rough WIP
more sms parsing/processing
generate xml submission from sms stock report
submit sms xform (no processing yet), and fix sms response
parsing of commtrack xml back into stock transactions
fetch product subcases
case blocks
dump transactions in legacy xml format
submit stock report
code cleanup
log commtrack activity in supply point's case action history
commtrack stock in ota xml payload
fix 'stocked out since' logic
fix misc reports and config UIs
change xml model for <transfer> sources/sinks after discussion with clayton
timestamp the stock xml
Merge branch 'master' into commtrack-makethehurtingstop

Conflicts:
	corehq/apps/commtrack/models.py
	corehq/apps/commtrack/signals.py
	corehq/apps/commtrack/sms.py
	corehq/apps/commtrack/util.py
	submodules/casexml-src
pillow moved
fix consumption rate pillow
fix bad import