Change rules
* add extra move on failed attack
* add button for switching lmb and rmb
* add conditions to water FF
* change mountain FF
* change survival check conditions
* disallow firing over mountains
* make ranger vulnerable on mountains
* make spearman block lancer's movement
* make most pieces unable to occupy mountains
* make horse unable to switch with enemy spearman
* make dragon unable to occupy forest
* make throne unable to breach + kill
* make all pieces unable to fire at forest
* fix fortress restore only on turn end
* fix turn lock when all pieces disabled
* fix GUI resize for screen keyboard
