By default add Tern Nature

What is recommended .tern-project for Node project ? does it must to be always?

{"libs":["ecma5"],"plugins":{"node":{},"requirejs":{}},"ide":{}}

Is .tern-project understood by tern.js ?

What about ternBuilder ?

            <buildCommand>
        <name>tern.eclipse.ide.core.ternBuilder</name>
        <arguments>
        </arguments>
    </buildCommand>