Move event logging table to runtime again (it is orthogonal to history) + change from clob to blob due to some db issues
Merge branch 'master' of https://github.com/Activiti/Activiti

# By Henry Yan (3) and Tijs Rademakers (3)
# Via Tijs Rademakers
* 'master' of https://github.com/Activiti/Activiti:
  Applied patch for ACT-2049
  Applied patch ACT-2050
  Applied patch ACT-2051
  Document for method taskCandidateOrAssigned in TaskQuery
  Javadoc for TaskQuery#taskCandidateOrAssigned.
  improvment task query using candidateAndAssignee