#351 Change org.apache.commons language library
Switch from org.apache.commons.lang
(version 2.6.0) to org.apache.commons.lang3
(version 3.1.0). In that way there we use only 1 commons.lang
library.
Note this PR breaks !293 (merged) so please hold this until !293 (merged) is merged.
Closes #351 (closed)