updated version number for pending release, replaced placeholder text…

… in license.

Update README.md

Merge pull request #48 from acarteas/FixShouldClean

Issue #42 fix

Merge pull request #41 from ndrwrbgs/b39

Add a ctor with all arguments

Apparently, I screwed up the PR and didn't notice. Oops!

Merge pull request #31 from acarteas/develop

update readme

Merge pull request #24 from simonthum/raw

Add a raw bytes cache mode

Merge pull request #23 from acarteas/develop

Another crack at fixing issue #18

Merge pull request #22 from acarteas/develop

Fix issue #18

Merge pull request #12 from maldworth/update-packages

With .NET Core 2.1 release, updated References to stable version