Merge pull request #19 from lsdeva/master

Modify the existing Concat operator to have any number of inputs.
Merge pull request #18 from wso2-dev/master

Merge pull request #13
Merge pull request #20 from lsdeva/master

merging commit from lali for 'config generation in recursively'
Merge pull request #21 from lsdeva/master

Center child editparts in operators.
Merge pull request #19 from wso2-dev/master

Merge pull request #14
Adding import existing configuration functionality
Merge pull request #22 from Gayany/master

Merging pullreq from GayanK for 'Adding import existing configuration functionality'
Merge pull request #17 from wso2-dev/master

Adding import existing configuration functionality