Removed redundant styles

These are already reset either by the browser or by normalize-css
Going back to default font-size of 16px

This is the font-size of the text gadget, and the browser default
Extracted common styles

Removed colour from button as it is overwritten below
Use normal primary colour for all elements
Our primary style is Georgia, not Helvetica Neue.

Added Georgia with fallbacks as recommended by http://cssfontstack.com/
Default browser typography looks better and is more expected.

Replace this by our Versal-specific typography later.
Give buttons sans-serif font again
Should be only necessary to put this on html
Added basic style guide
Made button a bit more consistent with buttons on versal.com
Fixed paths
Merge pull request #3 from Versal/simplify

Simplify. Verified!