README needs refined

**Is your feature request related to a problem? Please describe.**

I've noticed a couple of issues with the README that make it appear a little clumsy -

- Installation section is talking about using the sample projects rather than installing the package - the section's content is also formatted more like Wiki than README content
- The description header is superfluous
- The table of contents has only one sub-section under Usage (Obfuscation)
- Obfuscation is actually a header on the same level as Usage, rather than a sub-header as the ToC suggests
- Usage instructs people to a create a new console app - this is overly prescriptive and not necessary
- Obfuscation has its own sub-headers that aren't on the ToC
- Contributing section should point to the CONTRIBUTING.md file
- Credits section should probably be removed if we're just crediting ourselves

**Describe the solution you'd like**

- Correct the installation section to be about installing the package (probably move the detail about the samples to the Wiki as it bloats the README)
- Remove the description header and put the descriptive text under the title
- Move obfuscation under usage and shift a considerable amount of this to the Wiki to avoid bloating the README with only specific features
- Ensure the ToC is reflective of the actual headings
- Replace the text in the Credits section with something along the lines of "Please refer to the Contributing guide." (with a link)
- Remove the credits section