updated td-bulk-import.jar
renamed package: com.treasure_data.bulk_import.{prepare,upload}_parts to com.treasure_data.bulk_import.{prepare,upload}
changed bin/td-bulk-import
changed Constants and BulkImportOptions classes -- refined help messages
updated td-bulk-import.jar
changed BulkImportOptions class -- changed the class for mysql reader
changed MySQLTableReader classes -- with jopt-simple
updated td-bulk-import.jar
minor change of BulkImportOptions class