latest alpha supports a diffff.xml per pack. check the content of diffff.xml for usage instructions

this is a listing of conversions for the major renamings that we did at praxisberlin.
Merge pull request #47 from smakhtin/hsv_range

Hsv range, filter factory extra attributes, NuGet everything else
Merge pull request #45 from joreg/master

a custom diffff for the imagepack
fixes to the diffff.xml