added: support for m02s

[taylorjdlee]

Seems someone else made a branch to get m02s to work. Might need a few changes as it edited the phomemo-filter.py file but for CUPS drivers it seems fine

[taylorjdlee]

Issue #4 also talks about this

[taylorjdlee]

Overall it seems the M02s can use the same CUP drivers as the M02 though the phomemo-filter.py needs to be edited due to changes in the block marker (576 pixels in the M02s vs 512 pixels in the M02).

In this branch the M02s CUPS drivers are also seperate from the M02 driver even though they're the same (similar to the M110 & M120 in that regard) so I guess we have to decide if we want seperate drivers for all the printers or keep one driver for the M02 & M02s and another driver for the M110 & M120

EDIT: My bad the main difference between the M02 and M02s is the dpi is 203 for the M02 and the dpi is 304 for the M02s so there is a slight difference (this dpi change is why we have 576 pixels vs 512 pixels). I guess the question still stands if we want seperate drivers for all the printers even though there is similarity across a few of them.

[taylorjdlee]

Going to close this as I'm going to open a seperate PR with the changes and making the m120 use seperate drivers