Adds "--spec_dist" option to cpanspec and the SpecFileWriter package.  This
only has the writer class performing the prefix portion as a proof of concept.
Added most of the header information to SpecFileWriter.  Also added a generic "print" function.
Made the SpecFileWriter a bit nicer to look at.
Converted everything up to the install section.  Fixed a few bugs.
Converted remainder of logic to work through the writer