Moved the SDK-specific Contribution Instructions into the README
Added Nuget Images
Adding on device wiring test suite.
Fixed the charset errors with apostrophe
Removed html tags from README
Merge pull request #25 from zfields/wiringTestSuite

Adding on device wiring test suite.
Merge pull request #24 from anthony-ngu/UpdatingREADMEWithContribution

Updating README with contribution