removed "m-uno" makefile. An Arduion UNO R3 can be targeted with

	make uno CFG=uno

Eventually I would like to learn how to build into a config specific
directory by specifying only the target, however for now I can't get it
to build like that.

For example, if i have:

BIN_DIR	= bin.$(CFG)/

uno:	CFG = uno
uno:	build upload

the variable $(BIN_DIR) will not always have the same value, ie it will
be at times "bin./" or "bin.uno/" but not consitently.  However, by
setting CFG=uno on the command line it will always be set correctly.