Replace server configuration with Typesafe Config

Currently Wave uses custom configuration framework which is rather complex and inefficient. The configuration is stored in two files: server.config and server.federation.config. It is required to manually run ant target that generates sample configuration from templates. Also, it is very hard to override default values during automatic deployment and adding a new configuration property required to edit 3 configuration files and 1 source file.
The solution is to use a standard configuration framework like Typesafe Config.