Proof "About Mason"

Spell out "four," remove contraction of "he has" and correct spelling
of pastime
Proof "About Peter"

Spell out "five"
Proof Accelerator index page
Proof Accelerator Tech index page
Proof Accelerator FAQ
Proof Accelerator digital health index page
Maintain consistent capitalization in sidebar
Proof Digital Tech FAQ
Correct spelling
Merge pull request #9 from LillieW/source

Numerous fixes for typos all across the site.