Mostly a proof of concept that classes now can be loaded in
isolation and tested.

- Allow tests to load application only with the default
settings without having dependencies and/or side effects
from installation specific settings.inc.php. This also
allows us to make sure that settings.inc.php only contains
settings that are specific for the installation and not
settings that really belong in default.

- Make match method testable.

- During boostrap a few local variables are generated. To
allow us to stop using globals we need to update the config
objects before attempting to load any modules.

- Class is immutable and this returns a new object with the
new configuration. This allows us during bootstrap to change this before passing it to loadspkr modules.

- Make class use of config more predicable by stop using
global conf.
- Make the class vital methods more testable.

- Allow us to inject a configuration to class and enable us to test it before
refactoring.

Makes it easier to replace the use of global throughout the code.

- Reformatting
- Error 500 exits. Will never return.

- Easier to maintain without all errors.

Enable us to replace global states.

- Inject this into the needed classes and get
away from globals.

Resolve "Introduce PSR-4 autoloading"

Closes #12

See merge request !16

Do not implement properties or code. It is a interface
and should be typed as one.

CI now run unit tests. This should make failing tests pass.

Util that enable us to upgrade parts of code base if needed.

- Also remove extra include of settings. No longer needed.

- Composer PSR-4 autoloading.

- Reduce logic complexity.
- Return early. Code get called on every request and should be fast.
- Remove support for mirroring multiple uri. Code uses a long gone
PHP function. Split this into a private method.

- Also require the file. Force it to fail hard if not found.

Cleanup that improve code readability.

First thing application do is loading the settings making sure
that it is available.