Various

Global: added footer div, with .digital-presence class containing
external links
- externalized all css
- moved main.css to css folder and updated links for that file
- added wrapper div (.main-content) to main page content and media query
for that to limit width of rows on large resolutions

-index: added margin-bottom spacing to main rows, added wrapper div

-concert works page:  added .main-content wrapper div, adjusted the
panel headers of each composition so that one can click on any part of
that entire container to open the accordion and also adjusted the
background color of that to match the open composition info container
Fixed the merge conflict

adjusted JS declarations and analytics code