Updates to docs for 0.7.0. Includes YAML GS and new Location section.

- GS split to 1) Download and Deploy, 2) Catalog and Polices
- GS updated to YAML.
- many screenshots added.
- YAML sample moved to include file.
- brooklyn.properties now uses correct jclouds prefix.


**GS (1 - Download and YAML Deploy)**
![getting started](https://cloud.githubusercontent.com/assets/879000/2754486/02233104-c956-11e3-8bd9-842c66d1c285.png)

**GS(2) - Catalog and Policies**
![getting started policies and catalogs](https://cloud.githubusercontent.com/assets/879000/2754490/19b1209c-c956-11e3-98a2-5b346b423651.png)

**Locations**
![locations](https://cloud.githubusercontent.com/assets/879000/2754493/37172c3a-c956-11e3-8943-6b44d49d6bf6.png)