Load configuration explicitly

[piraz]

Currently the firenado configuration is being loaded importing the package firenado.conf.

This is a legacy solution since the beginning, besides of being somewhat convenient, it is pretty hash to set up test cases, and make the process of launching an application dependent of the current directory where the firenado command is being executed.

Migrating the firenado configuration load process to be executed explicitly will give us better control of how and when a configuration is set to an application.

We also could design the launchers to reload a configuration without triggering an application restart.