add maintenance information.
add missing getopt-option and extend usage-info.
bump the version.
add function determine absolute path to wiki.
add function to determine path of namespace

- In order to tackle the autochdir issue,
  we will need to determine the absolute
  filepath of a namespace.
use absolute instead of relative paths

- this solves the autochdir problem, because
  relative filepaths wouldn't work, if the
  context changes unexpectedly.
add haml and rdiscount dependency information.
bump the version to 0.9.5.
Revert "add maintenance information."

This reverts commit 677209eb7a36181cb65dff745a4137ae70f6393f.
Merge '0robustus1/master' into danchoi/master.