html docs: "new" shown on pseudo-classes

[gordonwoodhull]

@mtraynham pointed out in #1101:

Minor caveat on #1097 (the classes). Both jsdoc2md and grunt-jsdoc (with docstrap) add the "new" keyword to these classes. Most of the documentation doesn't use it, but dc.js will work with/without the keyword...

For example, the HTML docs show new compositeChart(parent, chartGroup), which works but is not idiomatic for dc.js. (For that matter, one would have to specify dc.compositeChart)

It probably means an extra object is created only to be thrown away.

[mtraynham]

https://github.com/jsdoc3/jsdoc/blob/master/templates/default/tmpl/method.tmpl#L10
https://github.com/docstrap/docstrap/blob/master/template/tmpl/method.tmpl#L7

Looks pretty static. Maybe we could just provide our own method.tmpl based on the docstrap one..

[gordonwoodhull]

Meh.