add info menu

[Martin Kolman]

add a menu for displaying various useful information

• submenus for each category

• modRana info:
  • current modRana version - done
  • project website and contact information - done
  • what device modRana thinks it is on
  • current paths
    • tile folder/s
    • tracklog folder
    • cache folder + cache size
  • GPS status
    • on/off
    • gpsd vs new gpsd vs liblocation
    • satellites, etc.
  • network
    • enabled/diabled
    • is it available ? ping ?
    • ip, hostname ?
  • varius statistics

• other info
  • sunset, world time ?
  • maybe do this ins some "current point/position" menu ?