Closes #10, adds Twitter/Facebook share links

Squashed commit of the following:

commit b22198b9ec32d0883e67872be45624f8deaba88c
Author: Andrew Thorp <andrewpthorp@gmail.com>
Date:   Tue Nov 19 22:33:14 2013 -0600

    ui changes

commit e6dfb6af938af35f6dfb4e7326a286a29a4ad1b3
Author: Andrew Thorp <andrewpthorp@gmail.com>
Date:   Tue Nov 19 22:29:32 2013 -0600

    refactored sharing logic, cleaned up ui

commit 5871b51e4dd226c09fe71bd922e7fd5acb95ddd8
Author: Andrew Thorp <andrewpthorp@gmail.com>
Date:   Tue Nov 19 22:04:15 2013 -0600

    removed counts from share links

commit 131d8cd75605adc40d217e927157a7df7f00d00e
Author: Andrew Thorp <andrewpthorp@gmail.com>
Date:   Tue Nov 19 21:41:18 2013 -0600

    working on share buttons

commit b9d489938618047fd7bf0a3334d9adbc77b951df
Author: Andrew Thorp <andrewpthorp@gmail.com>
Date:   Tue Nov 19 21:15:47 2013 -0600

    working on share buttons