add css class 'errorMsg' to error messages
modify two function comments to be more JsDoc like
 - add a custom attribute 'value_uri' to hold the URI of value (used to
create triple) instead of a separate hidden field
 - delete unused 'blur' function of autocomplete
remove hidden input field which is now unused
handle case where the range of a drop-down type property is specified
using owl:onClass and not owl:allValuesFrom
 - update test numbers
 - test to verify metadata includes refersTo type properties
Merge remote-tracking branch 'origin/master'