Version 2 features direct Hoa\Ruler\Model to PHP-Parser AST conversion (L-method) and reversible (R-method)
New: Support for variables
New: Support for operators
New: Packing the PHP into a closure
Fixed unit tests and enhanced readme.md

Warning: This commit assumes `Hoa\Ruler::getAsserter()` does not require a
`Hoa\Ruler\Context` to be passed in (which it does at the current moment
of writing). See README.md for more info.
Fix: typos in README.md