Added controls box and style, and a title parameter for the arrow, based on user feedback.
tidied control-box
Merge pull request #29 from parnelandr/control-boxAP

Control box ap
Sub titles added, top heading is in the above div as cannot access before the first layer entry ie can access after the first radio button. The other substitles are in the entry above ie Filter by factor is in the same line of code as No injuries
Merge pull request #30 from parnelandr/layerSelector-SubTitles

Sub titles added