Adds binary and multiclass demos.

New urls:
	.../demo/classification/index
	.../demo/classification/binary
	.../demo/classification/multiclass
Merge branch 'master' into classification

Conflicts:
	pages/demos.py
	templates/demos/svr/index.html
Cleaning minor things.
Merge remote-tracking branch 'upstream/master' into classification

Adapts classification demos to fit new specs.

Conflicts:
	pages/demos.py
	pages/views.py
Merge pull request #14 from dvalcarce/classification

Classification Demos