📝 Update README.md

Add the usages about IEasyCachingProviderFactory

Merge pull request dotnetcore#49 from dotnetcore/dev

Upgrading dependencies And Release A New Version.

Merge pull request dotnetcore#36 from dotnetcore/dev

Refactoring And Add new API

Merge pull request dotnetcore#27 from dotnetcore/dev

Release new version

💬 Update README for new release.

Merge pull request dotnetcore#13 from catcherwong/dev

Release a new version.

🚧 Coveralls Remove EasyCaching.Demo.*