Create standalone package from jme

[tlf30]

Monkey-Netty should have a standalone package for use in applications outside of jMonkeyEngine.
This can be accomplished by making the NettyClient and NettyServer independent of BaseAppState then creating a gradle module jme-monkey-netty that has BaseAppState wrappers for NettyServer and NettyClient.

With this, other applications, which may not depenent on jme, could create their own wrappers for NettyServer and NettyClient and take advantage of this library. This would also enable The Outside Engine to create an engine wrapper for the library, thus unifying this implementation and Outside's implementation.

[oxplay2]

Could be worth to make it work without JME.

Tho Monkey-Netty already refer to JME, so it sound odd, but idea overall is good.

I would suggest package names like:

• monkey-netty (can be used without JME)
• monkey-netty-wrapper (JME wrapper)