Merge branch 'release/0.2.1'
Small memory leak fixed
Merge branch 'release/0.3.0'
Merge branch 'release/0.3.2'
Merge branch 'release/0.3.3'
Merge branch 'release/0.4.0'
Merge branch 'release/0.4.1'
Merge branch 'release/0.6.0'
Merge branch 'release/0.6.2'
Merge branch 'release/0.6.3'
Merge branch 'release/0.7.0'
Using concurrent_bounded_queue for sending frames to make sender sleep while the queue is full
cleanup