tp #717 (needs testing before merge)
Merge branch 'master' into tp717
moved option name sluggification into the "finalize" step. added options parameter to XLF.sluggify. Testing expected behavior of the model on options
using modified XLF.sluggify function (with options) to specify how option names should be shortened.
in place editor now uses new sluggification rules
changing character limit from 30 (default) to 14
Merge pull request #210 from kobotoolbox/tp717

Tp717
Merge branch 'master' into question-library
Merge branch 'question-library' into question-library--question-app