Koha 3.0 nozebra 1st commit : the script misc/migration_tools/rebuild_nozebra.pl...

Koha 3.0 nozebra 1st commit : the script misc/migration_tools/rebuild_nozebra.pl build the nozebra table, and, if you set NoZebra to Yes, queries will be done through zebra. TODO :
- add nozebra table management on biblio editing
- the index table content is hardcoded. I still have to add some specific systempref to let the library update it
- manage pagination (next/previous)
- manage facets
WHAT works :
- NZgetRecords : has exactly the same API & returns as zebra getQuery, except that some parameters are unused
- search & sort works quite good
- CQL parser is better that what I thought I could do : title="harry and sally" and publicationyear>2000 not itemtype=LIVR should work fine