Add mounting options

This addresses #52 and adds options for both a custom point point name as well as the option to turn off automounting completely.

Unfortunately I can't get the testing exactly how I want it. I have tested it in isolated tests and both options work as expected. However, if I try to create setup and tests that work well with the rest of the test suite, there are some failures. I've tried various reloading strategies to force code to re-evaluate, but no luck so far.

I'm going to keep working on finding an adequate test set up but wanted to get this up to make sure the proposed changes to the code itself were ok.