Add information about which drivers are the default drivers.
Merge pull request #96 from groessler/something_to_pull

Add information about which drivers are the default drivers.
Simplify to use less 'if's. Add missing link options for Atari TGI
programs. Put '--start-addr' at beginning of ld65 command line.
Merge pull request #97 from groessler/something_to_pull

Update for samples Makefile
Merge remote-tracking branch 'upstream/master'