ZF3 component compatibility

This patch updates the module to provide forwards compatibility with v3 releases of Zend Framework components. Specifically:

Updated PHP minimum supported version to 5.6.
Updated all component and module dependencies to the latest stable releases; if v3 releases exist, these are supported via || constraints.
Moved Module class to src/ tree, where it belongs, and:
- Removed unneeded getAutoloaderConfig() implementation.
- Ensured attachment of event listeners is correct.
Updates factories to be forwards compatible with zend-servicemanager v3
Updates the SwaggerViewStrategy to be forwards compatible with zend-eventmanager v3, and updates how it is attached to the view event manager.

zfcampus / zf-apigility-documentation-swagger