Seperate Child Db Server

For Issue  #14:

* Spawns db.js and opens ports 3000,4000,5000 for each db with multilevel
* Parent sends the child the settings to get the settings.path

NOTES: 
* Haven't had experience with the Async Module, so refactoring might take a while on my part.

why only this levelup instance have '{keyEncoding: 'binary',valueEncoding: 'binary'}" as   an option?