Remove out_string (we only support binary)

Change-Id: I65ef0be9adb4265a5df31128f3f1b30e192f9779
Remove project-specific ntohll (use from libplatform)

Change-Id: I74cc3ffe4c57a4c963cdeb57e3e8810c01fdb8d0
Start adding UPR stuff

Change-Id: I947f2a82eab6861a12c4a8d25b3783b0e6bd8b10