fix act-1868
Merge pull request #220 from smirzai/act-1868

fix act-1868
ACT-1935: BeanELResolver hides target exception in ELException when catching InvocationTargetException
Merge branch 'master' of https://github.com/Activiti/Activiti
Doc fix, see https://github.com/Activiti/Activiti/commit/a2670adef73501734d4341761049e3fe482d71b7#commitcomment-5541809
Merge remote-tracking branch 'upstream/master'