Enh: Array.indexOf seems to be faster than its RegExp equivalent.
Enh: allowedDirsRE RegEx should test for full words not substrings.
Enh: now multiple mime types can be handler by one file handler. Formerly a file handler could handle only a specific file extension.
Ref: refactored the code.
v0.1.5: Enh: allow multiple mime types to be handled by one file handler.
Doc: updated docs.
Make: added a script to build docs.