Products page now exists and shows a list of available products
as well as a slide out menu containing non-functional product
filters.

The following changes have been made to the header componet:
  - Logo and title have been updated.
  - Navigation tabs for homepage and store are now shown in
    the header.
  - An overlay menu containing the navigation tabs is
    used on smaller devices.
  - misc. design and style changes.

Note: Mobile support has been implemented for both the products page
and the header.