DWR version 2.0.7

Our latest 2.0.7 release is a minor bug fix release.

• [DWR-60] - Synchronized block in DefaultScriptSessionManager locking entire appserver
• [DWR-144] - DWR annotation with IBM JDK 1.4 makes dwr throws an exception when first ajax call is done
• [DWR-291] - deadlock between DefaultScriptSession and JettyContinuationSleeper
• [DWR-446] - A timeout with id 0 is not cleared
• [DWR-461] - DefaultConverterManager.converters not synchronized