replace xpaths in error messages with shortened xlsform ${fielname} references
updated regex for matching xpaths in validate error messages.
pep8 cleanup
do not shorten '/html/head/model/bind'
Fixed variable name: sms_allow_medias -> sms_allow_media (proper English)
Forgot to commit to files...
Added SMS Response reference
Fixed failing test (did not change the header in the example xls)
Merge pull request #93 from modilabs/allow_media

Fixed variable name: sms_allow_medias -> sms_allow_media (proper English)
Merge with https://github.com/UW-ICTD/pyxform/master
bump version to 0.9.15
Changed Field Names per @mberg suggestion.
persist version change in all the necessary places
pulled in changes from https://code.google.com/p/opendatakit/issues/detail?id=814 by chris
add test for cleaner error message
experimental xml xform to json form
change to a more appropriate function name: create_survey_element_from_xml
do not break if item is not on list
remove unused parameter
bump version to 0.9.17: adding support for xform to json