Bump version for 0.27 SDK release
Permit json2json to be called on a none object-literal.

Like the internals of merge_dictionaries, json2json won't
attempt to merge a json file which is an object literal, with one
that is say, an array literal and will similarly just set the
merged json to the last supplied file.
Fix for json2json tool (which uses a different argument format)
Only support output version to file for '-o' argument (not args) in stdtool
Fix issues and warnings for pylint version 1.0
Support physics material from the shape.
Update exportevents tool to deal with newer format of custom event results
Bump versions for new release