Changes 0.0.23:
* add support for detection of tail and gnu cp, do not hardcode /bin/bash
  initial value
* use those detected binaries instead of previously hardcoded ones
* use `type -t` bash shell builtin instead of `which` utility for detection
  of file availability
* new option --noautosize to prevent overriding of user-defined paper sizes

Changes 0.0.22:
* added experimental support for xhtml1 source format
* create tex and xhtml subpackage in spec file to reduce requirements for main
  package
* automated detection of programs path in configure, program/utility path
  could be passed to configure by variable, allowed selection of default
  backend and default webbrowser (just for requirements at the moment)
* check for missing tools/programs, fail if tool is not available
* fixed libpaper cleaning up
* xmllint validity check now with noent option
* fixed --stringparam option
* added some messages to easier detection of troubles, used different error
  codes for various situations
* fixed FSF addresses, xmlif now licensed under GPLv2+

(adam)