A few fixes before releasing 0.2.2

- servlet-api is explicitly added to suro-server dependency
- DynamicPropertySinkConfigurator logger classname fixed
- KafkaSink, registers in servo Monitors
- KafkaSink, register SuroKeyeydMessage to Message.classMap on ServerSinkPlugin, this needs to be improved for better modularity
Merge pull request #56 from metacret/master

A few fixes before releasing 0.2.2