Version 0.5.4
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* Fix README to not display version stuff
* Write the rarian-update-mtimes file to $statedir
  - Fixes FHS compliance
* Remove some uneccessary memory allocations (Jens Granseuer)
* Fix infinite loop bug in update script --help
* Store configure.ac in SVN as executable
* Fix install when no prefix is specified (as autofoo insists on
  specifying to prefix variable as NONE instead of not defining it)
* Reenable the rebuild script and fix it when the mtimes file
  doesn't exist