* Remove package from sources
* Add Mocker package
* Add BaseModel
Beside setters and getters this class implements three methods required
for mocking: getOpenApiSchema, createFromData and jsonSerialize.
BaseModel keeps all data values in $dataContainer like PHP client does.
I don't see other way to support scalar models(enum for instance).
That's why I've removed class variables generation.
* Update documentation
* Update PHPUnit section in readme
* Add constant with models namespace
This constant will be required for data deserialization when handling
refs.
* Refresh samples
* Add samples generation config
