replace expired NuGet API key

Set version to 1.6.2

Update dependencies

Code cleanup

Set version to 1.5.3

Fix appveyor csproj version patching.

Merge pull request msallin#116 from msallin/msallin#112

msallin#112

Updated README to express the support of custom collate functions.

Updated README to express the support of custom collate functions.

Set version to 1.4.0.