Add Duration and excersize it on tests
Merge branch 'master' of https://github.com/benhutchison/prickle into add_duration

* 'master' of https://github.com/benhutchison/prickle:
  Update for 1.0.2
  Add test for pickling Date. Version update to 1.0.2. replubished to maven
  Add picker/unpickler for java.util.Date

Conflicts:
	shared/main/scala/prickle/Pickler.scala
	shared/main/scala/prickle/Unpickler.scala
Merge pull request #5 from ddispaltro/add_duration

Add duration