* Update composer constraint for 4.x compat
* 4.x compatibility: Rename "code" to "src" and add PSR-4 autoloading
* Restructure code and tests for PSR-4
* Implement namespaces
* Implement namespaced throughout
* PSR-2 formatting updates, separate Result from CheckSuite, implement PSR-3 logging, fix tests
* FIX Routes and template location
* Update readme. Allow check classes to be namespaced or not.
* Add entry to changelog
* FIX Ensure DatabaseCheckTest always has a member. Allow strings or objects for $check in the suite
* Update readme to be clearer about passing checks with or without namespaces
* Revert namespace checking and implement Injector aliases instead. Update readme.
