remove unneeded "color" argument in Clear() function

[txoof]

Some of the EPD libraries contain an unneeded color argument. It does not appear to be used within the functions and makes writing code that is portable to multiple displays difficult.

[bassettb]

Your PR should be isolated to the one or two issues you are fixing. Those file renames and total of 13 commits make it too cumbersome to review the changes. For it to have any chance of being approved, start with master and just make a few changes per PR.