Remove redundant null check
Merge pull request #263 from martin-grofcik/null-check

Remove redundant null check
ParallelGateway and InclusiveGateway optimistic lock issue fix + upgraded to latest Restlet and upgrade Jackson libraries
Merge branch 'master' of https://github.com/Activiti/Activiti
Applied mail task userguide patch
REST userguide uri fix
Merge remote-tracking branch 'remote/master'