EDI Dicom Support - Githubissues

This PR adds support for DICOM to the EDI project with additional changes to streamline processing.

Changes include:

Removed demo-files directory in favor of reusing “test” resources as examples
Updated README file’s CLI example
Refactored pytest contest fixtures to use resource files
Removed record count from EdiResult object
Added a PassthroughEdiAnalyzer for formats which do not track version information
Added DICOM support

resolves #25

LinuxForHealth / edi