Update manual
Update manual

* Add hyperlinks
* Add tip to check log files if achd is not working

golems/ach,chen0510566/ach,golems/ach,golems/ach,chen0510566/ach,chen0510566/ach,golems/ach,golems/ach,chen0510566/ach,chen0510566/ach,chen0510566/ach,golems/ach