installation: more cleanup and release preparation
installation: more cleanup and release preparation

* Completed list of pre-requisites, e.g. python-magic, pdftk,
  html2text, giflib-tools, pstotext, python-epydoc.

* Updated automake release options to use tar-ustar that does
  not have the restricting 99 char filename limit.

* Added several mising files to the distribution tarball (EXTRA_DIST).
  Fixed EXTRA_DIST syntax for FCKeditor.

* Updated POTFILE list.

tiborsimko/invenio-base,inveniosoftware/invenio-base,inveniosoftware/invenio-base,tiborsimko/invenio-base