added implementations of simple rule and unit tests
Fixed typos
fixed some spelling and changed to caretsian system in test
Merge branch 'simple-rule-implementation' of https://github.com/ragnhildkarlsson/Othello into simple-rule-implementation

Conflicts:
	src/kth/game/othello/simple/SimpleRules.java
fixed comment and variable name in private method getSwappableNodesInDirection
Fixed typos
added comment how mocking of board is avoided in testMoveOnOccupiedNodeShouldSwappNoNodes
Merge branch 'simple-rule-implementation' of https://github.com/ragnhildkarlsson/Othello into simple-rule-implementation
Merge pull request #19 from ragnhildkarlsson/simple-rule-implementation

added implementations of simple rule and unit tests
Updated to new coordinate system and new list representation
Changed tests to reflect new coordinate system and list representation
New coordinate system
Merge branch 'master' into BoardFactory

Get updates on the new coordinate system
Edited based on comments, formated