v1.1: Mouse support, better touch input, symbol menu overlay

Please install firmware version 3.3 for this Buildroot release.

This Buildroot release has the following new features:

• Vastly improved touch input
• Mouse support
  • Implement mouse mode
  • Toggle on touch while Shift is held
  • Berry key enters meta mode, Power key sends Tmux prefix
• Symbol menu overlay
  • Display by holding Sym
  • Reads customizations from the keymap file /usr/share/keymaps/beepy-kbd.map

New parameters at /sys/modules/beepy_kbd/parameters:

• touch_act: one of click or always
  • click: default, will disable touchpad until the touchpad button is clicked
  • always: touchpad always on, swiping sends touch input, clicking sends Enter
• touch_as: one of keys or mouse
  • keys: default, send arrow keys with the touchpad
  • mouse: send mouse input (useful for X11)
• touch_shift: default on. Send touch input while the Shift key is held