* remove some unneeded blackslashes in messages (caused malformed error message)
* put Magic in separate file
* delay message loading
* add version in extension credits, remove EOL whitespace
* update Translate extension
* No need for comment stripping in Expr.php anymore
* Updated srvus() to roughly account for these changes
* Gave comment handling its own preprocessor tag, and split off comment handling from extensionSubstitution(). This only applies for the non-HTML modes, since in HTML mode, comments are stripped early.
* Strip comments from template argument names (PPFrame::newChild).
** Move error messages to ParserFunctions.i18n.php
** Rename 'expr_...' to 'pfunc_expr_...' to be consistent with other messages which are localizable already
* Add CSS class 'error' to output of error messages