Changes to Gallery

1)  Added event description;
2)  Moved When and Where to right below title;
3)  Minor UI adjustments.
Changes to About

Addition of new content and corresponding styling to About page.
Minor change to footer

In footer, thicker border for Social div.
Hiding Contact link in Contact page

Hiding Contact link in Contact page - is a redundant link to self on
Contact page otherwise.
New content and format for Courses

New content and format for Courses - only 4 levels and aligning them as
vertical columns.