Implemented log viewer, purge DONE process action and PREFIX/var/run/bibsched_task_%d.pid for refactored BibTask class.
Implemented log viewer, purge DONE process action and
PREFIX/var/run/bibsched_task_%d.pid for refactored BibTask class.

inveniosoftware/invenio,tiborsimko/invenio,inveniosoftware/invenio,tiborsimko/invenio