Merge branch 'master' of https://github.com/Activiti/Activiti
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assignee and owner can be null at this point
Merge branch 'master' of https://github.com/Activiti/Activiti

Conflicts:
	modules/activiti-engine/src/main/java/org/activiti/engine/impl/persistence/entity/TaskEntity.java
Merge branch 'master' of https://github.com/Activiti/Activiti

Conflicts:
	modules/activiti-engine/src/main/java/org/activiti/engine/impl/persistence/entity/TaskEntity.java
Merge branch 'master' of https://github.com/marcusk24/Activiti
[ACT-1606] Add convenience method to TaskService to set a task due date
Various xml export issues fixed
Fix for failing tests on QA (sql files not yet updated  to 5.13-SNAPSHOT)
Merge branch 'master' of github.com:Activiti/Activiti
Fix for ACT-1623: NPE due to order of eventbaseGW
ACT-1594: Removing deprecated constants from Task
ACT-1484: Escaping of wildcard (%) character possible in 'like' queries
Revert "ACT-1484: Escaping of wildcard (%) character possible in 'like'
queries"

Further investigation needed for DB-specific handling
This reverts commit 54edc7291a66b5b44ad21f81ea962423babe6585.
Fix for ACT-1591: Referential integrity constraint violation on using IdentityLinks
Merge branch 'master' of github.com:Activiti/Activiti
Fixed mail task field declaration export
Merge branch 'master' of https://github.com/Activiti/Activiti
Extra test for ACT-1591
Merge branch 'master' of github.com:Activiti/Activiti