Adds source file and line number to JSX elements.
###In
<sometag />
###Out
<sometag __source={{fileName: 'this/file.js', lineNumber: 10}}/>
$ npm install babel-plugin-transform-react-jsx-source.babelrc
{
"plugins": ["transform-react-jsx-source"]
}$ babel --plugins transform-react-jsx-source script.jsrequire("babel-core").transform("code", {
plugins: ["transform-react-jsx-source"]
});