Renamed dump_xrefs to dump_core_xrefs to avoid conflict with similarly-named but differntly-functioning dump_xref

source_id removed from synonym,dependent_xref and primary_xref this information is available via the xref. linkage_source_id added to dependent xref. create_xrefs now also returns a hashref

small changes. Got Coord system and assembly mapper now from chimp db instead of human. Made bigger mapper cache and did preload.

naughty, naughty man! ;-)

another addition to make arnes sql to avoid race conditions work, apparently NULL is not less than 1 in mysql

changes to make the filling out the meta_coord.max_length column on the fly work