Modifies nav: removes Implementation Guide, adds Data Quality
Modifies index.md: removes Implementation Guide button, adds Data Quality button
Creates Data Quality Page (includes: feed_contact_email tracker embed and button to form to add to the tracker)
Fixes https://github.com/MobilityData/gbfs.org/issues/44
Modifies nav: removes Implementation Guide, adds Data Quality Modifies index.md: removes Implementation Guide button, adds Data Quality button Creates Data Quality Page (includes: feed_contact_email tracker embed and button to form to add to the tracker)