Merge pull request #38 from wso2-dev/master

Merge pull request #26
Merge pull request #39 from wso2-dev/master

Merge pull request #27
Merge pull request #40 from wso2-dev/master

Fixing TOOLS-2448
Merge pull request #41 from wso2-dev/master

Merge pull request #28
Merge pull request #42 from wso2-dev/master

Merge pull request #29
Merge pull request #43 from wso2-dev/master

Merge pull request #30
On-element renaming option for tree nodes and elements
Merge pull request #51 from Gayany/master

On-element renaming option for tree nodes and elements