Merge pull request #14 from Mercynary/master

[PAXWICKET-446] Deleted prefix for filter that creates wrong applicatin ...
Fixing serialization issue when using @PaxWicketBeanFilter
Merge pull request #15 from benday280412/master

Fixing serialization issue when using @PaxWicketBeanFilter
[PAXWICKET-454] Added synchronized blocks to handle concurrency