Try to fix AppVeyor build
Try to fix AppVeyor build

Add workaround deploy script, described here:
http://help.appveyor.com/discussions/problems/8215-cannot-publish-to-nuget-get-400-bad-request-error

anjdreas/UnitsNet,anjdreas/UnitsNet,BrandonLWhite/UnitsNet,BrandonLWhite/UnitsNet