kiji-rest: REST-149. Create skeleton packaging for KijiREST.

Create a skeleton package for KijiREST that contains the conf, bin/ etc with the
lib/ folder being populated later in the assembly process by any downstream
consumers. This allows for late binding of jars such as hbase, cassandra, hadoop
etc.

Review: https://review.kiji.org/r/2112/
Reviewer: taton
commit: https://github.com/kijiproject/kiji-rest/commit/74fbfbfebeaad88788a0296d241c38702ce11a06