Merge branch 'lscorcia-issue-818'

Correct versions of dependent packages.

Correct versions of dependent packages.

Updated NuGet packages.

Merge branch 'NilsEngelbach-feature/122-relative-urls-in-batch-payload'

Merge branch 'maxbruecken-fix-evaluation-of-constant-expression-conta…

…ining-mapped-properties'

Merge branch 'maxbruecken-negate-in-operator'

fix expansion split into multiple parts (simple-odata-client#783)

Fixed missing HttpRequestMessage header assignment from ODataRequest. (…

…simple-odata-client#786)

Updated copyright.