yi-hack-Allwinner 0.2.4

Improve (not used) h264grabber with a frame counter
Improve cleanup scripts
Improve RTSP with frame counter algorithm
Fix typo in sound detection sensitivity
Add beta support for aac audio
Update mqttv4 to last release
Update gsoap download site
Fix motion stop event when an event is started
Reduce overhead using discrete framer and improve log (rRTSPServer)
Overwrite SPS with one that contains timing info
Overwrite SPS with one that contains timing info (h264grabber)
Fix bug when buffer is overwritten (rRTSPServer)
Add wifi configuration to web page
Add MQTT Advertise (thanks to @EnricoFerro)
Add configuration through mqtt
Always start crond at boot
Decrease audio fifo size to reduce latency
Increase rRTSPServer process priority
Don't send again file with ftp if already sent