Update shifter-json test
shifter-json builder bug fix - string escape
Optimization of shifter.json.builder
Improvements to shifter-json; version 0.4.5
Fix for Json.obj; version 0.4.6
Remove shifter-cache (moved to project shade), update Jetty 9
Replace shifter.concurrency.atomic.Ref with scala.concurrent.atomic.Atomic
Merge pull request #39 from epigrams/master

Version 0.4.9