Refactor .card--page

Opening early so there's visibility because it affects a few apps...

- Refactors `.card--page`component and structure, removes specific layout styles
- Moves 'booking panel', TTD detail, lodging detail and 'stack article' styles to Waldorf
- Removes styles from `.stack__intro`, stacks should be structural only
- Removes POI pins sprite map (not related, but unused)
- Removes 'visual breadcrumbs' because they're not at all useful and get in the way

## PRs for apps

- https://github.com/lonelyplanet/waldorf/pull/1299
- https://github.com/lonelyplanet/community/pull/1693

## Screens

### Stack headings
![screen shot 2014-07-01 at 12 18 36](https://cloud.githubusercontent.com/assets/271645/3442257/d4a78fec-0111-11e4-837b-e1f90067eef1.png)
![screen shot 2014-07-01 at 17 38 24](https://cloud.githubusercontent.com/assets/271645/3446128/2e410976-013e-11e4-8187-f68b44e0724a.png)
![screen shot 2014-07-01 at 17 51 10](https://cloud.githubusercontent.com/assets/271645/3446290/f54c4c82-013f-11e4-8540-cef809d7a5e9.png)
![screen shot 2014-07-01 at 12 19 46](https://cloud.githubusercontent.com/assets/271645/3442255/d4a68a8e-0111-11e4-93e4-7031da5f17b6.png)
![screen shot 2014-07-01 at 12 20 35](https://cloud.githubusercontent.com/assets/271645/3442256/d4a735f6-0111-11e4-8499-0e606eb8fbed.png)

### Articles
![screen shot 2014-07-01 at 15 56 09](https://cloud.githubusercontent.com/assets/271645/3444628/e2a2ce68-012f-11e4-8719-1c018db8cf53.png)
![screen shot 2014-07-01 at 15 55 46](https://cloud.githubusercontent.com/assets/271645/3444627/e293acee-012f-11e4-8a09-56ccc4a2a67a.png)

### TTD details
![screen shot 2014-07-02 at 11 19 34](https://cloud.githubusercontent.com/assets/271645/3454522/9a78c892-01d2-11e4-95ca-e30a044053ad.png)
![screen shot 2014-07-02 at 11 19 57](https://cloud.githubusercontent.com/assets/271645/3454523/9a7a61f2-01d2-11e4-9d54-e0aa3c323ec8.png)
![screen shot 2014-07-02 at 11 20 14](https://cloud.githubusercontent.com/assets/271645/3454524/9a7add8a-01d2-11e4-8395-e3204faa6015.png)
![screen shot 2014-07-02 at 11 20 30](https://cloud.githubusercontent.com/assets/271645/3454525/9a7b81e0-01d2-11e4-8d52-95bd7e2c4d47.png)
![screen shot 2014-07-02 at 11 21 01](https://cloud.githubusercontent.com/assets/271645/3454526/9a7c16c8-01d2-11e4-9ed4-276c0ee84848.png)

### Lodging details
![screen shot 2014-07-02 at 16 19 48](https://cloud.githubusercontent.com/assets/271645/3457868/5f5f6d7c-01fc-11e4-8e4c-730f34077102.png)

Josh did some work a while ago to apply the basic colour palette to 'themes' which indicate their usage. So all contrasting sections will be the same and we won't end up with loads of shades of grey again!