chinese i18n for activiti explorer 5.11

* 'master' of git://github.com/Activiti/Activiti:
  Added 5.11-specific tests to the upgrade job.  Fixed upgrade scripts to cope with not compiling new methods in old activiti versions.

Added 5.11-specific tests to the upgrade job.  Fixed upgrade scripts to cope with not compiling new methods in old activiti versions.

CustomServiceTasks

Added more details to the description of how to configure a JavaDelegate
which will be invoked when reaching a CustomServiceTask. Referred to
existing detailed descriptions for JavaDelegate and field injection
elsewhere in the userguide and linked to the new extended section from
one of the earlier sections that briefly address runtime properties.

Conflicts:
	modules/activiti-engine/src/main/resources/org/activiti/db/drop/activiti.mssql.drop.engine.sql
	modules/activiti-engine/src/main/resources/org/activiti/db/drop/activiti.postgres.drop.engine.sql

proccess-spawned tasks