Merge pull request #2 from muhammadzaheer/haider

First.java
Neural Network: Cost
Merge pull request #3 from muhammadzaheer/zaheer

Neural Network: Cost
Deleting jmatio
README.md
NeuralNetwork
Removing class files
README.md
Backpropagation Algorithm
Backpropagation Algorithm
README.md
Backpropagation Algorithm
update
clean up
Backpropagation Algorithm : Cleaned
README.md
Commented code
minimization applied
fixing