Get vertical intervals working for 3D Wind Profiler data [1504]

Hey guys - this pull request also included the bug fix for contour label intervals - I thought we discussed at last telecon and you had accepted, but apparently it's still out there.

On this new one, there was a bug were the vertical interval for 3D displays was not getting applied.  I am attaching Before and After pics.  

Before:

![screen shot 2013-11-28 at 12 12 37 pm](https://f.cloud.github.com/assets/2334847/1645765/655c8ed2-5908-11e3-9cb6-ab9a40a2815a.png)

After:

![screen shot 2013-11-28 at 12 12 46 pm](https://f.cloud.github.com/assets/2334847/1645770/7677da6e-5908-11e3-935b-7cec21844f33.png)