Sipcall fix:deal with the speech and cancel request
==================================================================
	Edit Sip.app:
		1.Add a pjsip_rx_data pointer to store the cancel information
		2.Add some judgement
		3.Delete the while loop,because maybe we have to wait a long
		time for the response.
Sipcall bugfix:
==================================================================
	Send the sip message according to the message type(sipcall or
	the others)
Sipcall Bugfix: make the sipcall message downward compatibility
Merge branch 'task'

Conflicts:
	Sip.cpp