Move lwm2m_handle_packet() to a new file.
Handle registration reply.
Merge branch 'master' of https://github.com/01org/liblwm2m
Merge branch 'master' of https://github.com/01org/liblwm2m
Small fix to client and server traces.
Cosmetic rewrite of prv_find_object().
Bug fix: server select is better with a non-zero timeout.
Create our own version of coap_transaction.
Add retransmission of transactions with a new API: lwm2m_step().
Optimize lwm2m_step().
Remove usage of coap_transaction_t.
Source re-org: add a file registration.c.
Build system: improve usage of cmake.
Check that the transaction reply is coming from the right peer.
Modify lwm2m_decode_uri() to handle /rd and /bs.
Output received data in the client.
Add registration interface.
API Change: Callbacks for objects no longer use lwm2m_uri_t

URI can now adress objects and resources with ID 0xFFFF.
Bug fix: lwm2m_list_remove(), list may be empty.
Send Deregister to servers on lwm2m_close(). Handle Deregistration messages.