* support more xslt processors
* group changes per autor per day
* svn2rss?
* if an authors.xml file exists in the current directory automatically pick it up
* improve performance of processing authors.xml
* fix awk magic to not break with spaces in repository names
* find better names for options
* create backup of previous changelog file
* support specifying multiple --ignore-message-starting options
* svn2cl --strip-prefix=/ doesn't work as expected
