Contact Page Form: Replace contact forms on projects, about, & testimonials pages

[heosman]

As a developer, I will want to replace the current contact form with a Google form on projects, about, & testimonials pages.

Tasks:

• [x] Replace contact form with embedded Google form on projects.html
• [x] Replace contact form with embedded Google form on about.html
• [x] Replace contact form with embedded Google form on testimonials.html

Related to #42