[Init] Add initial source code

Add initial source code:

* lib: contains RSU code up to commit https://github.com/01org/renderer-service-upnp/commit/2d986ed5ea5c26e0ff5b3edefc9efd38b6a75b86
* I reported all (hopefully...) comments made on dleyna-server
* Still a lot of renaming tasks to be done in lib (rsu_xxx)