Correct HTML errors and table styling

Remove table borders using CSS
Replace '&' with "&amp;"
Prepare iframe

Remove borders and add ID ("map")
Add working files and .gitignore
Style histogram title
Fix naming scheme, link maps to categories

The categories must have the same names as the file names of the histograms and
the map HTML documents. The elements are accessed through the link text and
reloaded on click.
Delete maps that are no longer needed
Add mouseover events to maps
Finish maps

Maps are loaded dynamically, scripts are divided between files. First site
visit is loaded for Erdöl & Kernbrennstoffe. 1.0 is already deployed.
Merge pull request #1 from erget/jQuery_ClickSwitches

J query click switches