.Net Standard (#15) * remove obsolete file * convert project to .net standard * styleop update * revert (supported in standard 1.5) * remove gitlink * xunit, stylecop, specflow * fix usages of scenario context * dotnet xunit * use choco opencover on appveyor * opecover dotnet.exe path * fix path fix * -oldstyle codecov * full pdbs required by codecov * ps exit code * xunit -noshadow * cake to test * no need for opencover in appveyor * fix build of docu.csproj * fail if tests fail * indent fix * brig back stylecop settings for codefactor.io * try to make open cover fail the build * fix null return * added gitlink to cake * add gitlink to appveyor * move all build scripts to cake * fix appveyor cake script * fix cake params * haave gitversion update build number * gitverions prerelease * twaek gitversion task when on CI * no need twice * temporary workaround for context resolver * fix test * split tests in context readme * typo and test for both method and property