allow v2 format where "-[version]" is not present in the label.
bump version to 0.2
add two new methods find_all_by_service_tag() and find_all_by_service_label()
DRY the tests to not repeat the code for v1 and v2.
make the v2 vcap_services data lightly different from v1, to ensure v1 and v2 are truly tested.
change test for find_all_by_service_label to match using full label text "github-repo" instead of "github"
Fix indentation.