Improves aesthetics of distribution graph.

Closes #5

Squashed commit of the following:

commit 4e94f2c1325601a71732f7d236afedadf9c0f80e
Author: Donald Chen <d.chen72@gmail.com>
Date:   Fri Aug 8 13:03:36 2014 -0700

    prepares for pushing to master

commit 65615f76be5bdaadf561ef180c0ae71f2c55cdfc
Author: Donald Chen <d.chen72@gmail.com>
Date:   Fri Aug 8 13:03:00 2014 -0700

    prepares for pushing to master

commit eb8b567ca281eb6cd9e8d366cd429a97d529da36
Author: Donald Chen <d.chen72@gmail.com>
Date:   Thu Aug 7 23:14:21 2014 -0700

    now dynamically calculates left padding for distribution graph based on number of digits in the axes numbers

commit 677fe118cbd8214872b20fb4fee4e79076d34e69
Author: Donald Chen <d.chen72@gmail.com>
Date:   Thu Aug 7 11:08:58 2014 -0700

    changed bar graph color to blue
Improves look of the distribution graph.

Closes # 5