Cumulative fixes / updates since 2.0.1

• Addresses OpenTX 2.3.15 undocumented API change (#43)
• Add support for extended CRSF RF Modes (#39)
• Revised NV14 (Nirvana) event mapping (OTX/ETX compatible)
• Fix reversed up / down key mappings for non-roller radios (#35)
• Fix menu virtual key (#21) for Jumper T12 and T-Lite EVT_VIRTUAL_MENU_LONG (Menu long press)
• Add support for RM Zorro radio (#33), enter Widget configuration menu via EVT_VIRTUAL_MENU_LONG (Roller long press); dismiss the OS Reset screen with RTH to get to the menu.

Due to the fact that some combinations for compiled / source lua work on different devices, two Zips are provided.

• LuaTelemetry_v2.0.2-rc8.zip : Compiled LUA, should work on most radios
• LuaTelemetry_v2.0.2-rc8_lua.zip : Source LUA, compiles on device, should work in the simulator