Fixes:
 - occassional doubled link vibrations on BTLE devices should be gone
 - no grid / no invert day in calendar wasn't reimplemented when I rewrote it (oops!)
Improvements:
  - Added additional language support
    - Russian font positioning
  - Various optimizations/fixes/clarifications (e.g. static variables, comments, placeholders, function for PK/version upgrade)
  - Added debugging options to enable logging in deployed watches, for troubleshooting