Convert code for netstandard / 472 / 462. Fix up tests. Correct Typos. etc

[ChrisMcKee]

Hey; I've upgraded the sln to work with netcore as well as framework down to 462. I've taken the samples out of the sln for now (If they're important prod me and I'll spend the extra ten minutes wiring them in) and there will undoubtedly be some fettling required for the CI server config.

I removed the redis dependency from the tests and swapped it out for https://github.com/poulfoged/redis-inside. Other than the change (and some typos) the tests all pass fine unaltered.