We don't really need it at initialization time in ClassPanel and
OverviewPanel - it's only needed in load() method to which it's
already supplied.

In addition to expandable class, added not-expandable class for
links that should do nothing when clicked.

Instead of few complex templates, using more simpler templates
in combination with bunch of methods.

Allows to avoid warnings when extending classes for which we don't
have source code.  For example in ExtJS it's useful to specify
--external=Error, because Ext.Error extends the built-in Error
object.

With expandable class either set or not, as needed.

The calculation of first-child seems way too complex, but at least
it works.  Should be encapsulated somewhere.

- Removed empty anchor tag - using id attribute on h3 instead.
- Replaced cryptic classname "p" with "members-title".
- Adding a differenciating ID to the parent div and using
  descendants selector to set icon for the contained h3.

This way all styles are in the same format - like in ExtJS.
Additionally my editor has support for scss syntax, but not for sass.

Created separate class for dealing with the rendering.

Link from header to source file and fix prettify library links in
source files.  Also adjusted some class names and removed needless
top-block class from the containing div.

Well... basically just moved it to sass/ directory.

In fact converted the style.styl file in old Documentation app to
SASS.  Don't really know which format it was, but almost like SASS,
with enough differences though.

Also moved images directory inside resorces/ aside sass/ dir.

Finally changed the default CSS ouput style to :compact.

Instead one is supposed to manyall add extjs/ directory inside
template/ directory.  This could also be just a symlink to ExtJS.

Instead referencing it through this.toolbar inside OverviewPanel.

Only adding the clsName property for class nodes.

Removed .htaccess file, class URL-s are now in form:

    apidocs/#/api/Ext.Ajax

To make refreshing of a page work, added .htaccess file that
directs all api-URL-s to index.html.

Currently using URL in form: some-path/api:Ext.ClassName
I would like to use: some-path/api/Ext.ClassName

But I didn't figure out how to make them work, especially so that
it could be used from a local filesystem.  When the basedir of
the app changes, you can't use relative URL-s any more.

Before we had: "cfgs", "properties", "methods", ...
Now we have: "cfg", "property", "method", ...

Although naming array of events to just "event" looks at first
glance somewhat wrong, it makes looping over all the members
much-much easier.

Showing correct member names in member menus.

Replaced uses of Array.forEach with Ext.Array.forEach and
Ext.Array.map.

Divided the complex menu building logic into methods.

JSDuck now export JSON even in normal mode (without --json option).

When class name clicked in tree, the JSON is loaded and class
documentation displayd.  Currently we only show doc-comment of
the class.

Also turned off use of history.pushState - bringing it back in the
future.

Not needed, because we don't want to follow links directly,
but instead load JSON and generate the page.

- singleClickExpand
- cls