Change maps behaviour on area

- Possibility to zoom in map in area show
- Possibility to edit map in area edit
- Remove of tab "Edit map"
Issue 394 Add Delete function to Area Table
Issue 392 Add Type Column to Area Table
Issue 393 Add Export Function to Area Table: Basic Version

Basic Version, Todos:
- Add permission check on server
- Use drupal functions whenever possible
- Make pathes configurable
- Check file format
Issue 393 Add Export Function to Area Table: Ogr2Ogr

-Changed library to ogr2ogr
- defined path as constants
- Zoomable maps on observation/show
- Show dates with time
Fixed bug where are save was sometimes not possible
Change for export (Ubuntu Linux)
Merge pull request #397 from naturwerk/Matthias

Changes in map and export