Mostly just ensuring that we don't crash if bogus input is given.

The layout of example was a bit messed up when iframe loaded initially.
Tried waiting for Ext.onReady inside iframe - didn't help.
So currently just hard-coding a 100ms delay.
Crap.

Firefox doesn't support innerText (use innerHTML + stripTags).

According to the agreed-on spec for type-definitions-format with
the VJET Eclipse Plugin team.

Added bunch of tests to make it real solid.

Running it on SDK now produces some hords of warnings.

Previously it produced JsonP files - not that good for export.

Instead make use of the instance variables @opts and @relations.

Extracting a big chunk from the god class JsDuck::App.
The options object can now be easily passed around, unlike
with the previous system where every option needed to be
passed separately.

The bin/jsduck is now really short and readable.

'options' is a common name that one could give to normal event param,
better to have this special appended param named so that there's
smaller chance for conflicts.

Bit of refactoring.  Using the each_member method of JsDuck::Class
and also adding local each_member to loop over members of all classes,
plus a local warn method to more easily format warnings.

Previously it was required that (optional) is always lowercase.

With this we avoid creating a link every time some text mentions
Ext JS. But we still get a link when Ext.SomeClass is mentioned,
or even if Ext#get is mentioned.

Instead of the previous 'void'.

Also hide the return type in method signature if method returns nothing.