Re: More axes for `ftmulti`

[Werner LEMBERG]

> OK, will go for the first scheme.

Here are the new key assignments that I currently have (but not yet
committed), please comment.

```
  ?           display this help screen
  q, ESC      quit ftmulti
  F1          toggle axis grouping
  F2          toggle anti-aliasing
  F3          toggle outline hinting
  F4          toggle embedded bitmaps
  space       toggle rendering mode

  , .         previous/next font

  y           cycle through hinting engines (if available)

  Up, Down    change pointsize by 1 unit
  PgUp, PgDn  change pointsize by 10 units

  Left, Right adjust index by 1
  F7, F8      adjust index by 10
  F9, F10     adjust index by 100
  F11, F12    adjust index by 1000

  a, A  adjust axis 0
  b, B  adjust axis 1
  ...
  p, P  adjust axis 16

  F5, F6      adjust axis range increment
```

    Werner