Formatting, Web and Tel changes.
Moved XML-Serialization classes to package data.xml.
Renamed Hotspot class to Pov
Added fields description, mail, imagecopyright and imagepath to PoIs.
Added layout for PoIs with the new fields.
Updated cafe data.
Updated hotel data.
Updated museum data.
Added NL versions for museum-descriptions.
The App now checks for language-specific XMLs or loads the one without a suffix.
Added pictures for some museums.
Fixed Layout for PoI with pictures.
Merge branch 'feature/poichanges' into develop