2020-06-15 Ticket Merging Service, Source and Partner Routing Additions

• fixes spec header copy for IP PIN
• adds link to IP PIN recovery site, per #173253505
• Reformat db/vita_partners.yml according to how Ruby outputs it
• Add source routing for North Texas Area United Way
• Add source routing for NeighborWorks Umpqua
• Use png version of DFATS logo
• Use cropped Rappahannock logo
• Add source routing for Coalition of Community Assistance Volunteers
• Update translations for get started slab button and message
• Ticket merging (#313)
• Uses local_assigns.fetch to simplifiy opt passing of data-track attrs
• Adds get started banner to bottom of stimulus page
• Add state routing for Massachusetts to MASSCAP/Boston Tax Prep
• Minor translation improvement on warning page
• Add environment warning page in non-production
• adding Rappahannock and Desert Financial logos
• Add source routing for Desert Financial and Tax Services
• Add source routing for City of Miami
• Allow VitaPartnerImporter to move source params between partners
• Add tests for VitaPartnerImporter
• update-help-text-on-1099-misc-page-#173234790