Framework

Hi Charles,

I've added a new branch, "framework," which adds a new Xcode project that builds  YmsCoreBluetooth as a static framework which can just be dragged and dropped into user's projects.  I also made some additions to the README.md file describing the framework and how to use it.


Seems to work pretty well in my projects - please take a look and let me know what you think!

best regards,
  Dave