Added an index on firstoccurence for sqlite. #918
Added an index on firstoccurence for sqlite. #918

PVince81/sabre-dav,fruux/sabre-dav,staabm/sabre-dav,PVince81/sabre-dav,staabm/sabre-dav,staabm/sabre-dav,PVince81/sabre-dav,fruux/sabre-dav,fruux/sabre-dav