Merge pull request #6 from izerui/master

自由流跳转,目标节点是并发节点,自动分发.
update readme add video address
you cannot add mysql jdbc configuration in application.properties, it will
broke application startup and testcases. just revert.
origin JumpCmd can handle parallel gateway, see JumpCmdTest
update documents
correct #7 label of connection mislocation.
use addIdentityLink for delegateTask
manage user
manage group
manage membership
manage job
fix compile error
use ACT_ID_USER from select user
Merge remote-tracking branch 'xuhuisheng/master'