YAML Upload/Download & HoundCI Fixes

All HoundCI fixes have been completed and users can now download and upload YAML files. The changes that have been made regarding the HoundCI fixes are in the main Tagging merge file at https://github.com/MarkUsProject/Markus/pull/1947. 

For testing, YAML files were generated and then re-uploaded by the system. Each of the files generated were successfully re-uploaded by the system.
@david-yz-liu I switched over to downloading YAML just because users can upload YAML files. There is no good way to upload XML files from what I found.