Responsive Bartik D7

This project is the D7 version of Bartik with a responsive, mobile-first layout.
It is derived from this issue: #1192044: Convert Bartik's layout to mobile-first and responsive; which is the D8 version.

This project uses Drupal 8 Bartik Theming guide provided here Bartik theme.

In addition to the changes made to the D8 version, this version will also include the following features:

• HTML5 markup
• WAI-ARIA accessibility roles added to primary elements
• Html5shiv, Respond.js, Selectivizr.js for IE versions 7 & 8
• Collapsible menu on small screen sizes
• Collapsible tabs on small screen (look #2834211: Responsive Tabs same as D8 Bartik for details)

Co-Maintainers
Responsive Bartik D7 was originally written by mjohnq3

#D7AX - I pledge to make this theme as accessible as it can be. If you find any flaws, please submit an issue. Help me fix them if you can.