Added *.out to .gitignore
paper: Alpha version of regression section

Things still necessary to do:
1. mentioning bias-variance with reference to stanford slides
2. mentioning leastSquares and leastSquaresGD
3. explaining analysis of categorical data:
	- connection/no connection with the two classes,
	- why we didn't do anything with it in the end,
	- maybe talk about dummy variables (but I'm not familiar
	with the topic and there is no time
4. deciding which plots shall be used
5. rerendering all the plots so they look nice
twoClassPredict.m: Formatting improved