Correcting potential NPE
Removed test logging
Use thread classloader if none are available
Null parameter handling on Serialization Interceptor
Handle case in which content is null
Added back task, process, and work item id discrimination for execution
service
Added null process instance handling
Corrected case where ReleaseId might be null
Added external Serialized fact handle
Added RuleFactory to convert fact handles
Updated RuleService to return FactHandle
Added the ability to retract fact handles
Should be delete instead of retract
Cleaned up repetitive functions
Added getObject and getObjects to RuleService
Merge pull request #94 from abaxter-rh4u/master

Better null handling. Proper per process instance handling on JMS. Fact retrieval and deletion functionality