[WIP] Notes page.

@tymofij , @olmar , @jmclaus please review.

sandbox: http://polesye.m.sandbox.edx.org/courses/edX/DemoX/Demo_Course/edxnotes
@polesye And since we are expecting notes in descending order, we might as well give an array containing such, to avoid confusion:
```
notes = [
{
    created: 'December 11, 2014 at 11:12AM',
    updated: 'December 11, 2014 at 11:12AM',
    text: 'First added model',
    quote: 'Should be listed first'
},
{
    created: 'December 11, 2014 at 11:11AM',
    updated: 'December 11, 2014 at 11:11AM',
    text: 'Second added model',
    quote: 'Should be listed second'
},
{
    created: 'December 11, 2014 at 11:10AM',
    updated: 'December 11, 2014 at 11:10AM',
    text: 'Third added model',
    quote: 'Should be listed third'
}
];
```