Lots of fixes and new glyphs

• Swap ⊓ and ⊔
• Fix ˜ (make it different from ~)
• Fix F, G, L, Ģ, ģ, €, a, Њ, њ, ª, q, r, ă, 𝔾. 𝕗, 𝕣, 𝗮, 𝗾, 𝗿, 🬭, 🬮,
  🬼, 🬽, 🬾, 🬿, 🭀, 🭂, 🭄, 🭆, 🭍, 🭏, 🭐, 🭒, 🭓, 🭕, 🭖, 🯆, 🯇, 🯈,
  ԍ, 🯉, ↉, ⅒, ↩, ↪, ❌
• Point to SIL license using HTTPS URL
• Add ╵, ╷, ╶, ╴, and ⃛
• Use a constant to set which font file to use