Fix recordStore cleanup bug
Fix MIDP.nativeEventQueues[isolateId] undefined error when shutdown isolate
Custom property microedition.platform in url.
Merge pull request #473 from PinZhang/pzhang/recordstore-cleanup

Fix recordStore cleanup bug
Merge pull request #481 from PinZhang/pzhang/mising-isolateid

Fix MIDP.nativeEventQueues[isolateId] undefined error
Merge pull request #483 from PinZhang/pzhang/platform-in-url

Custom property microedition.platform in url.
Implement methods to draw elliptial arc with tests.