Implementation of Mountain.class and some changes

...ompileTransaction/stash-dir/BoardElement.class.uniqueId13

...compileTransaction/stash-dir/BoardElement.class.uniqueId2

...a/compileTransaction/stash-dir/Controller.class.uniqueId6

...a/compileTransaction/stash-dir/Controller.class.uniqueId8

...ompileTransaction/stash-dir/CrossMountain.class.uniqueId5

...ompileTransaction/stash-dir/CrossMountain.class.uniqueId9

...va/compileTransaction/stash-dir/CrossRoad.class.uniqueId1

...va/compileTransaction/stash-dir/CrossRoad.class.uniqueId2

...compileTransaction/stash-dir/EmptyElement.class.uniqueId3

...compileTransaction/stash-dir/EmptyElement.class.uniqueId8

...mpileTransaction/stash-dir/ExtinguishFire.class.uniqueId0

...ileJava/compileTransaction/stash-dir/Fire.class.uniqueId6

...ileJava/compileTransaction/stash-dir/Fire.class.uniqueId7

...compileTransaction/stash-dir/FireFighter.class.uniqueId12

...compileTransaction/stash-dir/FireFighter.class.uniqueId15

...leTransaction/stash-dir/FireFighterFinder.class.uniqueId4

.../compileTransaction/stash-dir/FireFinder.class.uniqueId10

.../compileTransaction/stash-dir/FireFinder.class.uniqueId16

...pileTransaction/stash-dir/FirefighterGrid.class.uniqueId3

...pileTransaction/stash-dir/FirefighterGrid.class.uniqueId9