Added LinearActivationFunction
Added DeltaRule for multiple patterns online and offline
Merge branch 'master' of https://github.com/mlichwala/mleko-sc-task1.git

Conflicts:
	output.txt
	src/main/java/pl/lodz/p/mleko/softcomputing/task1/App.java
	src/main/java/pl/lodz/p/mleko/softcomputing/task1/DeltaRuleTrainer.java