Merge pull request #75 from lsdeva/master

generate datamapper ui for null item array
Merge pull request #50 from wso2-dev/master

Merge pull request #37
Merge pull request #76 from lsdeva/master

fix TOOLS-2491
Merge pull request #77 from lsdeva/master

remove dot from one length argument
Merge pull request #51 from wso2-dev/master

Merge pull request #38
Introducing new context function when it create since same context
cannot be used for every time 
Introducing a new exception type to validate function body
Merge branch 'master' of https://github.com/wso2-dev/developer-studio
Merge pull request #52 from wso2-dev/master

Merge pull request #39
Adding anonymous root support for json
Adding null array support for schema builder
Merge pull request #78 from Gayany/master

Adding null array support for schema builder and anonymous root support for json
fixed a bug in function executor - scope not initialized
Merge branch 'master' of https://github.com/wso2-dev/developer-studio
Merge pull request #53 from wso2-dev/master

Merge pull request #40
Changing export schema type
Merge pull request #80 from Gayany/master

Changing export schema type
Merge pull request #41 from wso2-dev/master

Merge branch 'master' of https://github.com/wso2-dev/developer-studio