All necessary targets/cross parameters from Tweet objects are now converted and stored as generic extensions.
STREAMS-69 | Updated Tweet serializer to use LinkDetails object as the URL extension schema
Fixed the Hashtag mapping in the tweet schema and updated the serializer to only store hashtag text
Merge branch 'Generic-Extensions'

Conflicts:
	streams-contrib/streams-provider-twitter/src/main/jsonschema/com/twitter/tweet.json
Merge pull request #2 from robdouglas/Generic-Extensions

All necessary targets/cross parameters from Tweet objects are now conver...