Update to Bootstrap 5

A much needed major overhaul.

• Refactor to use a single html template and front matter for each error page removing redundant html and making easier to customize error page layout
• Update to Bootstrap 5
• Update to Bootstrap Icons
• New simplified layout

Several Typo Fixes

Releasing several typos and small fixes that have been found and merged in.

Cleanup & Convert to Jekyll

Total overhaul to convert the pages to Jekyll to make managing them easier.
Other Updates

• Switch to use MaxCDN
• Update to Bootstrap 3.3.4
• Update to Fontawesome 4.3.0
• Add Jquery from Google CDN
• Add new page for 403 Forbidden Error
• Add new page for Rate Limit Error