0.4.3

• Start queueing responses before sending command request. Fixes issue of command responses being occasionally missed by the responder due to a race condition 4a31041
• Implement set_tuner_band for setting the frequency band only 7d9ac4a
• Refactor set_tuner_frequency and _calculate_am_frequency_step 7d9ac4a
• Move PARAM_TUNER_AM_FREQ_STEP to system param to avoid its removal on param update 7d9ac4a
• Implement _command_queue_wait to wait until command queue has finished executing. Wait for queue to be flushed before building source dict, and also after setting tuner band as this may trigger _calculate_am_frequency_step 7d9ac4a

Full Changelog: 0.4.2...0.4.3