Added use of NuGet to get NuGet.Core package.
Merge pull request #15 from dtewinkel/UseNuGet

Added use of NuGet to get NuGet.Core package.
Merge branch 'UseNuGet' into AddUnitTests

Conflicts:
	NuBuild.sln
Merge remote-tracking branch 'origin/master' into AddUnitTests
Fixed .gitignore.