fix issue #31

If no predicate info are available (rdfauthor.cache.js), rdfauthor will
query the knowledgde base for predicate infos and will extend the
cache.

owl:DatatypeProperty = literal widget
owl:ObjectProperty = resource widget
fix issue concerning adding widgets which haven't set rdfs:range (issue #31)

While adding properties which haven't defined rdfs:range, no widget was
added. This is an fix related to commit
633c198d29965ba8185227fd950f6d84a6a24c58 and issue #31.
add uri check for label request

Prevent requesting label if object value is a literal and not an uri.
remove debug log
refactor uri check regex
change default limit for resource widget to 15
remove restriction
deb changes for 0.9.6
Merge tag 'v0.9.6'

v0.9.6