revert 328639e890639033d18e6a4a4e9a57e75fdb97db and 005941d4ba54a6e5f2558167bb73d152d195ffc4 and remove exception linking from AgaviXsltRenderer and AgaviScribeLoggerAppender. Thank you, PHP 5.2, for having retarded ctor arginfos. Closes #1308 for good.