refactor mirror_dist_target to accept a prefix arg
refactor mirror_dist aiming for a dist_dirs field
implemented dist_dirs config option
refactor: implement dist_dir via dist_dirs
document dist_dirs
support dist_dirs in config
oops, commit resources for testing dist_dirs
recactor: test code into a shared example
janitorial: copy dist_dirs by value for maintainability
add test for dist_dirs missing
Merge pull request #9 from mantacode/stsmith-dist-dirs

READY: implement a dist_dirs config option