RecordList methods added: filter, search, search_records

openerp_proxy.ext.data.RecordList.filter method added
openerp_proxy.orm.record.RecordList.search method added
openerp_proxy.orm.record.RecordList.search_records method added

Object.simple_fields property added.

Record.refresh changed to reread only fields that was in data

RecordList not reads only simple fields by default