DevMfrName == BlueBasic info URL
Strip ( from functions

Simplifies the expression parser if we don’t include a ( in the token
name. Also let the keywords be reused for non-function purposes.
Allow ports to be excluded from builds.
More expression tweaking
Rename BTSET to BTPOKE

And BTGET to BTPEEK .. which seems a bit more BASICy
Count values inside (...) for better error handling