Survey (Grid) V1 Updates

First time adding to a project with git. So if I'm doing something incorrectly please let me know.....

When using "auto add takeoff and land WP's" I Added the ability to chose RTL instead of just LAND.

![addrtl](https://cloud.githubusercontent.com/assets/3828006/3868354/ed4df3f0-2039-11e4-971f-514f85bef7a1.png)

Also added code to save the camera trigger type chooses, I always forget to change when using survey.