[cleanup] sorted our misplaced/useless requires
[evol] improved Order classes a lot (closes #101)
[fix] Order management was broken #2
[fix] Order management was broken
[licence] updated copyright years and added missing headers
[cleanup] better class/modules names for a few items
[evol] translation rework: new mechanism to handle translated/untranslated strings, make use of translation parameters, moved I18n class, translations update
[fix] catch problems when splitting the command line, and do not forget to include gettext support for the error messages
[fix] Order: correct silly mistakes
[evol] commands management rework #2: moved command parsing out of the Mail class and created new classes to handle it