migrated from old identify to validate library
added more validation
update maxlength attr on input fields to match
remove require luci.commotion.identify
fixed typo in cbi model
check uri before checking connectivity
Merge pull request #65 from opentechinstitute/commotion-lua-helpers-pull-3

FIRST BUG: ...ib/lua/luci/controller/commotion/apps_controller.lua:352: attempt to concatenate a nil value = FIXED! 

Branch tested and ready for merging.