New Features:
- new "settings" and "about" dialog
- hero biography is now scrollable
- added button to lock scrolling of the game viewport

Bugfixes:
- fixed a bug that led to loss of heroes in version 1.25.
  Added correction code to refund coins lost due to this bug.
- chip sell prices were not converted to B or kiB
- SHR 9 (and higher) chips had no effect
- attackers stopped appearing when pausing the game between two waves
- corrected delay between waves in "fast forward" mode

Miscellaneous:
- stage 8 made easier
- LEDs now go out instead of turning red
