Adding musician list and very basic CSS

* Adjustments to html/css in response to intalling Gumby to simply have everything readable and layed out decently
* Musician list updates dynamically from Firebase
numerous css changes for beautifying; also changed firebaseGetSongData to remove old data after updating new data instead of before as new data was getting removed
fixing logo and loading message css
Merge pull request #28 from artfoundry/css

Css