qos : queue_stats fixes for dynamic number of queues and queue stats without qid and ifname working.
 - Sustainable stats.

 - Device specific queue stats
 - Interface name now reading through UCI ports and code modularised, signal-handler code removed
 - removed qosmngr shared object from Makefile
 - Initial comments disposed.
 - Source code moved to seperate src directory
 - Added syslog in place of fprintf error logs.

 - seems to be working
 - Tests do not give warnings anymore
 - Unit and functional tests working
 - some more progress and minimal documentation
 - fixup to be squashed
 - temporary branch for easy-soc-libs
 - add gitlab infra support
 - qos ubus JSON reference for testing
 - Add QoS UCI config schema
 - add qos ubus JSON schema