fix zend\log title for overview
to to of
Merge branch 'hotfix/#773'

Close #773
Merge branch 'hotfix/#774'

Close #774
Merge branch 'hotfix/#784'

Close #784
Merge branch 'fix/intro' of https://github.com/samsonasik/zf2-documentation into hotfix/#786
Merge branch 'hotfix/#786' into develop

Close #786