This class provides an easy way to retrieve all the strings for a multilingual
site from a data source (i.e. db).
The following containers are provided, more will follow:
- PEAR::DB
- PEAR::MDB
- PEAR::MDB2
- gettext
- XML
- PEAR::DB_DataObject (experimental)
It is designed to reduce the number of queries to the db, caching the results
when possible. An Admin class is provided to easily manage translations
(add/remove a language, add/remove a string).

Currently, the following decorators are provided:
- CacheLiteFunction (for file-based caching)
- CacheMemory (for memory-based caching)
- DefaultText (to replace empty strings with their keys)
- Iconv (to switch from/to different encodings)
- Lang (resort to fallback languages for empty strings)
- SpecialChars (replace html entities with their hex codes)
- UTF-8 (to convert UTF-8 strings to ISO-8859-1)