Fixing a timescale error

The recent eras with less than 1 million years in length were not being
correctly accounted for. This set of commits fixes that.

Fixing spacing in the CSS

Removing development script

Fixing a time period error

Embarrassing. I had some time periods flipped around and not properly
displaying their time periods at thousands of years and not millions.

Fixing montage building scripts

This reflects the correct time period images.
Merge branch 'master' of github.com:scimusmn/paleogeography