#191 - simplified README.md

Moved syntax examples for
       * asserting calls in VB
       * event-raising
       * constructor
       * assertion
       * return syntax
       * creation
       * call configuration
     after ensuring everything was in the wiki.

Augmented some code in FakeItEasy.Examples, just to make sure the examples were valid.
Moved most other README.md content into a new Quickstart wiki page.

Fixes #191.