v2.1.2

BUG: fix trigger counter reset
BUG: fix trigger counter missing first trigger
BUG: fix SRAM FSM missing first data word after reset
ENH: MSO2104B support
ENH: fadc_rx external trigger and programmable delay
ENH: support WEISS SB22 heat/cold chamber
ENH: added SiUsb3 transfer layer for new generation of MIO devices
ENH: rename host folder to basil to allow packaging
ENH: rename device folder to firmware
ENH: wait_for_ready()

Note: run "python setup.py develop" after updating basil