Added stub manifest parsing code to handle a single manifest line.
Added more linetypes, began to solidify line construction method for manifest parser.
Added the rawline attribute to the Line objects.

Comments throughout the Line module, now Lines store
the original input as a string in addition to the
parsed information. This is useful for debugging and
error messages.
Added sample manifest file to demonstrate the different line formats.
Removed test cases from the Line module.
Merge branch 'feature/manifest-parser'