Merge branch 'release' into develop
FF 6.6: corrected the pushed-products extraction for campaigns.
Query fields with multiple values now handled correctly.
Added a bunch of test responses.
Added CompareAdapter.
Added SimilarRecordsAdapter.
Merge branch 'develop' of https://github.com/mbuettner/FACT-Finder-.NET-Library into develop

Conflicts:
	FactFinder/FactFinder.csproj
	FactFinderTests/FactFinderTests.csproj
	FactFinderTests/Json/FF66/JsonCompareAdapterTest.cs
	FactFinderTests/Json/FF67/JsonCompareAdapterTest.cs
	FactFinderTests/Json/FF68/JsonCompareAdapterTest.cs
Added ProductCampaignAdapter
Added FF 6.9 support.
Added support for new tracking API.
Merge branch 'develop' into release
Added release notes and updated assembly versions.
Cleaned up usings.