Add linear regression
Merge branch '89ao_theme'

Conflicts:
	_posts/2014-10-19-machine-learning-linear-regression.md
	_site/2014/10/machine-learning-linear-regression/index.html
	_site/feed/index.html
Merge branch '89ao_theme'

Conflicts:
	_posts/2014-10-19-machine-learning-linear-regression.md
	_site/2014/10/machine-learning-linear-regression/index.html
	_site/feed/index.html
Added neural networks