Convert MCP300x to support MCP320x and MCP330x devices as well
libpropeller no longer requires extra pre-requisites (env. variable)
libpropeller and Simple are both downloaded via their import scripts
PropWare Makefiles needed updating after MCP300x -> MCP3000 switch
Merge remote-tracking branch 'remotes/origin/release-2.0-nightly' into release-2.0

Conflicts:
	.gitignore