Allowed for READABLE_STRING_GENERAL in `raise' and `raise_retrieval_exception' to match the new capability of the EXCEPTION class to store Unicode description.


git-svn-id: https://freeelks.svn.sourceforge.net/svnroot/freeelks/trunk@703 6d4a7a74-6026-0410-acef-abb7cea3cd6d
Reverted signature of `raise' to STRING otherwise descendants classes (e.g. in Gobo) do not compile out of the box.


git-svn-id: https://freeelks.svn.sourceforge.net/svnroot/freeelks/trunk@704 6d4a7a74-6026-0410-acef-abb7cea3cd6d