allow module names to end in "-test" in addition to "-tests"

minor fix to allow more relaxed module naming, +comments.
add "and whose YUI module name ends in `-test` or `-tests`."

+ minor edits
edit debug log message
Merge pull request #16 from isao/naming

allow module names to end in "-test" in addition to "-tests"
minor edit

Remove incomplete mention of old comma delimited whitelist option.
It is still supported in the code however.