Added Embers scheme

## Embers color scheme for Base16 Builder
Added `embers.yml` to ***base16-builder/schemes***

Preview
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**Embers Dark**
![embers_dark_il](https://cloud.githubusercontent.com/assets/6362150/2908928/40f561d4-d62d-11e3-8f28-6de08b0d84a7.png)

**Embers Light**
The light version is still in progress...
![embers_light_il](https://cloud.githubusercontent.com/assets/6362150/2908931/469da15a-d62d-11e3-9b1d-5dacedca025c.png)