Project Intent: to modify files accorinding to instructions
Commit Intent: Add the cost function to computeCost.m file
--------------------------------------------------------------------
*computeCost.m
-Added cost function J(theta) based on instructions @:
 'https://share.coursera.org/wiki/index.php/ML:Linear_Regression_with_Multiple_Variables#Cost_function'

*Ran ex1.m from the Octave GUI