Support hardcoded starting prices.

The Coindesk API doesn't have data going all the way back. But since history
isn't changing, we can simply put in known prices.

Also, extend the CDPR cells to have four digits instead of just two.

tui/asset/asset.go

@@ -206,7 +206,7 @@ func refillProjections(m *Model) {
 
 func renderEntries(c moon.Column) (entries []string) {
 	entries = append(entries, fmt.Sprintf("$%.2f", c.StartingPrice))
-	entries = append(entries, fmt.Sprintf("%.2f%%", (c.CDPR-1)*100))
+	entries = append(entries, fmt.Sprintf("%.4f%%", (c.CDPR-1)*100))
 	never := c.CDPR <= 1
 	for i := range c.Projections.Dates {
 		var cell string