SVK::MimeDetect - interface for MIME type detection algorithms
This defines an interface for MIME type detection algorithms. A MIME type detection module doesn't need to inherit from this module, but it does need to provide the same interface. See "INTERFACE" for details.
new should return a new object which implements the "checktype_filename" method described below. The default implementation simply returns an empty, blessed hash.
Given a single, absolute filename as an argument, this method should return a scalar with the MIME type of the file or
undef if there is an error.