Fix namespace to match the new organization name. about stampie-bundle

[stof]

As the configuration won't be backward compatible either (as we won't keep support for the HTTP adapters but switch to HTTPlug) and that the only class of the bundle that people actually interact with is the bundle class, I'm fine with changing the namespace.

People would have to update their config file (required already even without renaming the bundle), update their kernel to use the new bundle class and update their calls getting the mailer service (if they don't use autowiring). That's fine with me.

[fbourigault]

Should we change the namespace and break compatibility just to match the organization name?

[Nyholm]

I actually do not mind. But we are still breaking BC with our next release.