Initial crap version of new members in this verison.
Group list of new members by classes.
Extract Columns class from Categories.

Let it manage the columns splitting logic so we can also share it
with new items list.
Split list of new members also into columns.

Use the Columns class to do the splitting in exactly the same way
as in Categories.
Render names of new classes as links.
Place new classes into separate section.

Instead of having the class names in headers be the links.
Remove accessor methods from new items list.
Move filtering methods of News to private section.
Turn importing off by default again.
Remove new-methods icons from API overview page.

Leave just small stars behind new classes.  This way it's lot
less cluttered.

The new "New in this version" section covers the details of
what's new much better and doesn't get on the way.
Sort new members by name.

Previously the order was pretty-much random.
Extract method for new members filtering.
Extract #visible? method to check for member visibility.
Strip URL parameters when creating base URL.

The problem arose from links produced by Marketo which took the
following form:

    http://docs.sencha.com/architect/2-0/?mkt_tok=LONGHASH#!/guide

Now we're stripping all URL parameters after the question mark, leaving
just the path and hash-bang parameters.
Up version to 4.9.0.
Merge tag 'v4.9.0' of https://github.com/senchalabs/jsduck into sencha

Tagging 4.9.0 release.

Conflicts:
	lib/jsduck/categories.rb
	template/app/controller/Content.js