Merge pull request #6 from phbender/add-temp-info

added info for current slope
Separate model from representation thoroughly
added lxml dependency for XSUD importer
parsing the beast
added optional color for each malt
tried to find a reasonable place for the recipe converter stuff
validation decorator for recipes

... untested, I suspect that validation does not work correctly,
or at least: is not called correctly. An empty string as first argument
does not raise any exceptions.
removing script functionality from module file

Code has been removed and extracted to a separate bin file. This is mainly for
testing reasons, the import functionality should be available from the web UI
in future.
integrated import in web ui