Update to allow usage with zend-mvc v3

[weierophinney]

This patch builds on #33, and makes the following changes:

• Updates the composer.json to add zend-router as both a development and suggested dependency.
• Updates the composer.json to remove zend-mvc from the suggestions list.
• Fixes several factories which did not work correctly with zend-servicemanager v2.
• Updates the Mvc page type to inline the zend-mvc ModuleRouteListener constants, and thus remove the explicit dependency on it.
• Updates the Mvc page type tests to vary test setup based on whether zend-mvc v2 or v3 is in use when testing.