I started by copying proto's model right off, but there were a number of subtle improvements that I wanted to make, namely: - Renamed Configure.p6 -> configure - Copied Configure.pm from proto into druid, so that druid doesn't have to depend on proto. See commit 7cff8e945cf30a2cac9794d01a803f688050f0bb in proto. - I don't care for the lib/Test.pir target. Instead, I added RAKUDO_DIR to PERL6LIB; feels cleaner. - I don't care for Configure.pm running make. Changed the comment to let the user do it herself. - added 'env' commands to set the PERL6LIB variable both in target 'all' and in target 'test'.