Additional filter operations: isnull and isnotnull#387

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jaredcnance merged 6 commits intojson-api-dotnet:masterfrom

NullVoxPopuli:additional-filter-operations

Sep 4, 2018

Commits on Aug 28, 2018

Commits on Aug 29, 2018

apply pr feedback
NullVoxPopuli
committed

Commits on Aug 30, 2018

add additional assertions to test specific todoitem return
NullVoxPopuli
committed

Commits on Sep 4, 2018

fix test -- make assertions directly related to the feature under test
jaredcnance
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