Pyecospold

Modified
- Switched to using pycasreg.

Added
- Generic attribute for some choice attributes.

Fixed
- Missing XSD in packaging.

Added
- Parsing EcoSpold02 XML files.
- Validating files.
- Parsing whole directories.

Modified
- Filling in static default values provided in config.ini and dynamic ones.

Added
- Setting attributes for custom classes.

Added
- Parsing EcoSpold01Dataset XML files.
- Saving Python objects to XML files.
- Configuring default values for non-existing attributes.