new features
  * new parameter ivrinputcode in astercc.conf, when it has a value, system only save correct input code(transferred) in CDR.
  * first call date in campaign module
  * agent blind transfer API
  * SMTP server support tls
  * auto fill mac into device in auto provisioning 
  * address book for yealink auto provisioning
  * add agent rank report
  * add Baidu TTS support
  * use *65 to check out device agent
  * add IVR to update agent password after agent log in on phone
  * support astercc-chrome-plugin
  * add DID prio for queue
  * export callerId and DID when export work order
  * use redis to cache mysql table schema
  * auto popup work order in customer service module
  * work order could read data from customer in customer service module
  * auto exit ACW after submit option in customer service module
  * close tab after submit option in customer service module
  * new option in campaign module to prompt agent to save call result
  * allow creator or agent group admin to check work order

bug fix
  * customer status and agent was removed when import duplicated customer
  * when reset agent was checked, duplicated customer was reset
  * if username is Chinese and longer than 6 bits, agent window couldn't be open in agent group page
  * import was slow due to a inefficient sql 
  * if agent transfer a call, he could not transfer another call unless the previous call hangup
  * agent got an undefined work order notify
  * agent got no notify when work order was assign to agent group and agent
  * when assign customer in campaign, it didn't should up customer if only team was chosen
  * import script only checked if phone1 was duplicated