scripts/i18n: introduce new i18n maintenance script The translation files in the Kallithea repository contained references to the location(s) of each string in the repository. This is useful to translators, but is not needed for all other users. The big problem with that information is that it changes very commonly as a result of normal development in Kallithea, causing a lot of unimportant delta in the Kallithea repository, thus causing unnecessary repository growth. A script 'i18n' is added to help maintain the i18n files. Functionality will be added later.