Re-write web pages (batch 1)

[melindaburgess]

Batch 1 of web pages takes the content from the following pages:

• Learning about OpenACRs
• Roadmap

... and creates new pages that are better organized with improved content. The new pages are:

• Why OpenACR
• OpenACR initiative

Please refer to the content audit to see how these changes reflect the recommendations.

If approved, these changes can be incorporated into the website according to the new proposed structure

[melindaburgess]

@mgifford This is work that I have actually completed. I created the ticket to document the work. Please tag appropriately and move to DONE (or rather, REVIEW for them to be approved) :)

[mgifford]

See https://github.com/GSA/Section508.gov/pull/229