Version 1.1.4

- eliminated double refresh for "fast partial update"
- moved wavetables to the driver classes
- added one explicit drawImage(...) and writeImage(...) method (for removed default paramter values for 1.1.3)
- added init method with added parameter  initial, for re-init after processor deep sleep wakeup
- added init parameter pulldown_rst_mode, for special RST handling (not needed for waveshare shield)