Responsive pages

[hmillersarah]

Add responsive to IMS Central pages that do not need further design guidance.

• Home page, excluding banner
• APIs page
• Automation page
• Java page
• IMS Database page
• IMS Transaction Manager page
• IMS Gold page
• Documentation page
• Support page
• 404 page
• Videos page
• Courses page
• Navigation header
• Navigation drop-down