Add the option to make secure requests

Add a checkbox which toggles secure requests

/cc @zendesk/quokka

### SCREENSHOTS
![screenshot 2014-04-22 12 52 41](https://cloud.githubusercontent.com/assets/687974/2761071/48da8dc2-c9c9-11e3-8624-d5bf300dceca.png)

Results in:
![screenshot 2014-04-22 12 53 01](https://cloud.githubusercontent.com/assets/687974/2761072/4fb4a8c6-c9c9-11e3-96ff-313c6b01276a.png)


### RISKS
- None