Instead attempt to auto-detect if we are parsing Ext4 code.

With help of this option JSDuck is able to generate both Ext3 and Ext4
documentation.

The specific case was a code that contained:

    Ext.Ajax#reqeust

JSDuck assumed that if class name is correct, the member name
must also be.  A bogus assumption, now fixed.

For some reason the file was marked as executable.

Grouped options into three sections by purpose:

- the main options.
- output customization options.
- debugging options.

Should make useful options much easier to find.

This option is barely used, so better to have only the long version.

Specify ext-debug.js only for development.

That's the specific of ExtJS, not JSDuck.

This time a brute-force solution.  But at least it works correctly, and
for such a small n as we have it should be fast enough.

Also a suite of more compact test cases that cover more cases than the
previous ones.

This fixes the constructor docs for Ext.Element, which has its
members spread out in several files.

Simplified the structure of overviewData.json file. Categories
and class names are now inside one data-structure, and no columns
are specified.

Current implementation of splitting classes list into columns
is too simple-minded.  Have to improve it.  Otherwise it's working.

This should reduce the memory footprint a little, as we remove
the duplicate dom-nodes.

Like with guides, HTML is created once and added as hidden div
inside index.html.  The index page view component grabs the
HTML from there and displays.  This way this HTML-creation is
done only once -- although my manual measurements showed no
real difference in page load time, we are loading one file
less, which is good.

The overviewData.json file is no more hard-coded to JSDuck and
is specified through this option.  When left unspecified, the
classes overview list on the main page is left empty.

For some reason Ext.create() was unable to load Ext.XTemplate
on demand.  But anyway it should be better to do all class loading
asynchronously, so now the creation of XTemplate happens at
class instantiantion time (rather than at class definition time).

A better name.

By doing the selection after expand, the tree scrolls the selected
item to view.

This way all the methods are named similarly:

- loadClass
- loadGuide
- loadIndex

The activeUrl was not set when switching to index page, so when
one tried to switch back to the previously visited page, that
page was still listed in activeUrl, and the switching was cancelled.

Now all pages are switched through the Classes controller.

Well... before this there was no error message at all - just
the load mask stayed on.

Convert favorites saved in old format to new format.

Make history and favorites work with guides.

Lots and lots of refactorings.

This allows us to specify a particular order for the guides listing.
Additionally: the guides not listed will be excluded completely.

JSDuck creates HTML for the guides section, listing all the
available guides specified with --guides option, and places
the HTML in index.html inside a hidden div.

Tweaked styles to automatically adjust to fit all the guides links
to the Guides section at index page.  Previously the column-widths
were simply hard-coded.

Additionally the guides section will now be completely turned off
when no --guides option specified.