#491 #494 #453 remove online library version checker, add remote plugin, themebuilder for mono themes

[davetcc]

1. Removed the dependence on library version XML which was barely ever correct in the versions it suggested, and hindered the move away from thecoderscorner for the library documetnation.
2. Added the remote plugin for client connection. Should work on most Arduino boards using regular libraries.
3. I've created two new mono themes that use Themebuilder instead of the old method. These were so easy to do, I'll do the rest before the next release, they also make the code much more readable and someone would have at least a chance of editing them

[davetcc]

Sorry I know this is a particularly large PR, all tests pass including all automated UI integration tests against tcMenu Designer.