Merge branch 'wip/nodejs' into 'master'

* wip/nodejs:
  added correct newCallCreated callback
  nodejs: callbacks get queued to run on main loop
  nodejs: added data structure conversions and more callbacks
  nodejs: fix build error
  nodejs: created RingDaemon JS Class
  Added Typemaps to handle Callbacks
  nodejs: added more callbacks
  nodejs: implement two Javascript callbacks
  bin: allow to build multiple subdirs
  nodejs: build with ring
  nodejs: build module after generating bindings
  update for latest daemon API changes
  remove unneeded file
  fix include
  gyp: link with dring
  Included dring source directory in binding.gyp file
  nodejs: add initial module

Change-Id: Ia9df106109531d6f27b0621c3d2ee433ee3460fc