Bug 8519 - Make koha-index-daemon run on startup

Bug 8519 - Make koha-index-daemon run on startup

[This patch was split out from tcohen's excellent patches for bug 8519
--jcamins 2012/10/31]

Added a new koha-index-daemon-ctl.sh script that uses the
'koha-index-daemon' provided by Koha::Contrib::Tamil (install via CPAN)
to process the indexing queue ('zebraqueue' for now, 'indexqueue' in the
future I guess :-P).

This script could be easily modified in the future for using another
index queue processing script (a more abstract indexing script for both Solr
and Zebra, etc). I removed all zebra-ish stuff from it.

Documentation patches will be provided as followups, once Mark Tompsett's
docs are pushed to avoid continous rebasing.

Tested to work on an up-to-date Ubuntu 12.04.

Sponsored-by: Universidad Nacional de Córdoba
Signed-off-by: wajasu <matted-34813@mypacks.net>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>