Figure out better repo organization for distribution

[cholmes]

Right now the repo will just get zipped up to be distributed, but the best practice seems to be to put that info in a folder and then have other folders of tests and other relevant files.

[cholmes]

The release 'process' right now is to have the main repo up to date with the release tag and then just go one directory up and run: zip -r qgis_plugin_gpq_downloader.zip qgis_plugin_gpq_downloader/ -x "*.DS_Store" "*.gitignore" "*/.git/*"

So making that a command would be a nice step. And then also moving the files so that the plugin is in a folder, instead of the whole repo.