version:1.2.0 code name: leuven

Highlight:

1. App notes are added to the project on many specific topics
2. Three external contributors are acquired

New features:

1. 802.11n (WiFi 4)
2. Arbitrary 802.11 packet injection from user space
3. CSI (Channel State Information, freq offset, equalizer to computer)
4. IQ capture (single/dual antenna, real-time AGC, RSSI, IQ sample to computer)

Improvements/fixes:

1. Increase the number of TX queue in FPGA from 2 to 4
2. New FPGA ARM interaction mechanism to avoid crash
3. PHY rx performance optimization (channel estimation, frequency offset, etc)
4. Improve low MAC to align with the standard better