Merge pull request #23 from nathanathan/develop

Merge with modilabs
Taking out gh org name for modilabs merges
Merge pull request #24 from nathanathan/develop

Reverting validate wrapper and condensing multiline empty labels.
Removing Validate warnings message when there are no warnings
Merge pull request #25 from UW-ICTD/develop

Fixing orx:meta element bug and support for new Collect features
Merge pull request #26 from UW-ICTD/develop

padding xpaths + generating repeat_count nodes + lowercasing column headers
Merge pull request #27 from UW-ICTD/develop

Reverting column header lowercasing and adding a few aliases instead
Merge pull request #28 from UW-ICTD/develop

Resolving issues with empty labels, whitespace, and calculations
Merge branch 'master' of github.com:UW-ICTD/pyxform into develop
Adding support for rows column