Add New CSS Technical Question: What is CSS and what is its purpose?

[izulien]

ISSUE TYPE

• Typo
• Bug
• Feature

WHERE / WHAT

Help flesh out technical questions page by adding categories not already represented.

EXPECTED BEHAVIOR

Give quick and simple "What is CSS" and give some general info on how it can be useful in web design.

REPRODUCTION STEPS

Add document what-is-css.html
Update link in technical.html to direct to new question page.

[izulien]

I'll take this one and have a PR up by the end of the day.

[Whizkevina]

Is it still open for contribution!