fix for install error "PHP Extensions "0" must be loaded." since php version 5.4.10

Signed-off-by: Björn Herzke <bjoern@bherzke.de>
Merge branch 'hotfix/ISSUE-152'
Merge branch 'master' of github.com:wrongspot/mageplus into hotfix/ISSUE-151
Merge branch 'hotfix/ISSUE-151' into develop
Merge branch 'develop' of github.com:mageplus/mageplus into develop