Register gateways and servers
Refactore Server class

Transform every attributes to an array of configuration
Move getCommandLineArguments in each server class
Add server's config property
Refactor gateways
Change the way the server and the gateway are created
Rename Config to Options
Missing getType renamed to getName
Change Config to Options after renaming of the Config class
Rename Configuration to SymfttpdConfiguration
Test server and gateway register
Remove methods from Symfttpd that are in the container
Check if the resource changed by its mtime
Remove ConfigurationGenerator as parameter of getCommandLineArguments
Add event dispatcher and rename config to options
Remove use statements from application
Refactor gateway and server configuration generator
Update GenconfCommand test
Update the container keys for the server and gateway generator
Fix InitCommand