v1.6.1

1. create tenant no need ask country, currency, timezeone, offsets, it autocapture from timezone
2. component select support multiple, simpleapp allow multi-select too
3. improve symbol of formula in jsconschema
4. support manage module in config
5. support runWorker concept, which allow execute code outside of service classes
6. provide data id at before validation hook
   7.simpleapp support jrxml to pdf print preview
7. solve formula sometimes can't execute