order manager cleanup

removed unused initialize function
bugfix: restore price data

priceengine restore from database did not load correct number of period.
database backup performance improvements

. removed output of rowcounts
. replaced index re-creation with stats updates
added tick size support

added support for tick size t1 data writes.
added data purging to database backup script

added removing of data older then n days for minute and day tables.
backup.sh processing sequence changed

moved collection of stats after data deletion.
added command line options to backup.sh

added optional processing for tick data delete / backup and history
processing.