Merge pull request #28 from wso2-dev/master

Concat and Split transformers modified to handle identical input and
fix null point exception for null elements, handle config build when
delimiter null
Merge pull request #29 from wso2-dev/master

Removing hover actions of treenode elements
Merge pull request #43 from lsdeva/master

fix null point exception for null elements, handle config build when delimiter null