Added HashDiff class library and console app.
Added unit-tests project
Added VS solution file
Added NuGet package restore
:couplekiss: Post-build event for merging the Core class library with the console app.
Added NuSpec manifests for NuGet package creation
Added MSBuild script to create the NuGet packages :smiley_cat:
Merge pull request #1 from leekelleher/develop

Merging in the "develop" branch