fix for navbar menus getting too long and not displaying background color at bottom; menus now scroll after a certain height
Adding clearButtons function to fix bug with track buttons not lighting correctly but also to add a future clear grid button functionality
moving control panel to left side and respacing everything to fit on laptop screen
Changing colors and instruments

* Changing panel color to lighter color for easier reading
* Changing instruments for better sounds
* Changing instrument range
* Deleting unnecessary instrument mp3 files (unused notes)
Adding new instrument buttons
Moving user names for channels next to track buttons and adjusting sizing and spacing for cohntrol panel
Merge pull request #35 from artfoundry/css

Css