All the files stored on disk should be charset independent

Some files use special characters (from the french alphabet), which are not part of the standard 7bit ASCII, thus are not charset independent. The encoding of thiese files is set to ISO8859-1. This is OK for most system, as this is the default charset in most countries. However, it can create problems on other systems (for me a javascript wasn't working).

This also means that not all files are correctly i18n-ized.