Adding options

Adding a simple way to change parameters.
This simple method will be used to add some slightly more complex
visualizations
Adding a basic color interpolation function

This will be used to add color 'trails'
Added trail effects
Clean up the look a little of the settings area
Merge pull request #1 from dmcgrath/master

Merging pull request of dmcgrath: "Adding a basic way to modify parameters. Added a 'trail' effect."