Merge pull request #1 from tud27837/JakeBranch

Removal of test string.
Code placed into separate classes and most elements wrapped in methods.
Code placed into separate classes and most elements wrapped in methods.
Created high, low, normal, and reverse gravity switches.
Merge pull request #2 from tud27837/ZackBranch

Created high, low, normal, and reverse gravity switches.
Updated with new revision.