Updated cat parser to read type_prefixed from the API representation
Add categories to maps.conf
Reset collection if categories are in configuration, else fetch.

Fixed bug where type_prefixed wasn't being set
Now the root category isn't necessarily '/' so get root node
List categories by the plural name
Set "parentcat" attr depending so we can child categories

This way the hierarchy of categories isn't beholden to the type/prefixes
Get children from parentcat attr
Added museum category now we show children based on structure
Removed rooms from maps.ox categories
Merge pull request #1 from ox-it/custom-categories

Custom categories