Review epd2in13

[robweber]

Review the function calls for the Waveshare device and make sure the omni-epd abstraction uses the right methods, with the right parameters based on the library and example code. Any modifications should be patched in a PR referencing this issue.

Library file:
https://github.com/waveshare/e-Paper/blob/master/RaspberryPi_JetsonNano/python/lib/waveshare_epd/epd2in13.py
https://github.com/waveshare/e-Paper/blob/master/RaspberryPi_JetsonNano/python/lib/waveshare_epd/epd2in13_V2.py
Example code:
https://github.com/waveshare/e-Paper/blob/master/RaspberryPi_JetsonNano/python/examples/epd_2in13_test.py
https://github.com/waveshare/e-Paper/blob/master/RaspberryPi_JetsonNano/python/examples/epd_2in13_V2_test.py

Things to check:

• init() method
• display() method
• clear() method
• sleep() method