add multi-dataset support, remove old examples folder
Squashed commit of the following:

commit 2c53f2bcaba674ad2f43cc161fceedfe094dae11
Author: Ben Robbins <ben.robbins@gmail.com>
Date:   Sun Nov 24 17:56:31 2013 -0600

    tolerate 1d array

commit beaaa695d83b45b9b29fdcc22e1f3b75b52b2b43
Author: Ben Robbins <ben.robbins@gmail.com>
Date:   Sun Nov 24 17:52:54 2013 -0600

    cleanup

commit 1c203b3f03f89f14d16e125fc810592e93f6e8c1
Author: Ben Robbins <ben.robbins@gmail.com>
Date:   Sun Nov 24 17:27:40 2013 -0600

    working multi-dataset support

commit 684d52e1ee0f115b8b40e49b0d86faba40254c6b
Author: Ben Robbins <ben.robbins@gmail.com>
Date:   Fri Nov 22 12:15:05 2013 -0600

    flatten datasets

commit ab86cabfe164676f322b904a8787d1a27b2dc0a0
Author: Ben Robbins <ben.robbins@gmail.com>
Date:   Fri Nov 22 11:26:20 2013 -0600

    cleanup, pad datasets to same length

commit 0d1fceac6b5493184756b25b90d394fc56a23805
Author: Ben Robbins <ben.robbins@bazaarvoice.com>
Date:   Wed May 1 13:31:53 2013 -0500

    started adding multi-dataset support

commit 42a90bc2aa97f8ab9556742c2ce9b62e6433f929
Author: Ben Robbins <ben.robbins@bazaarvoice.com>
Date:   Tue Mar 26 10:47:29 2013 -0500

    removing old examples folder

commit 22557871aa0bfc85c9dce9fdaf89adc80570ac97
Author: Ben Robbins <ben.robbins@bazaarvoice.com>
Date:   Wed Mar 20 15:59:36 2013 -0500

    more notes

commit 1c99a0edb5794a7f2c9016e51e96ba1eddb04107
Author: Ben Robbins <ben.robbins@bazaarvoice.com>
Date:   Wed Mar 20 15:21:54 2013 -0500

    adding notes about multiple datasets