The special iframe for Touch 2 is now specified through this option,
but more importantly users of JSDuck can now use inline examples
for their own components by simply writing a custom iframe.html and
linking the needed JS and CSS files from it.

Fix LocalStore#cleanup to not remove the settings stored under
different local-storage-db name.

Modified origin commit by Nick Poulden by wrapping ExtJS welcome
page inside <div id="extjs-welcome"> similarly to Touch welcome
page inside <div id="touch-welcome">.  This way they're both
nicely wrapped and ExtJS welcome page doesn't get screwed up.

For now I'm just turning it on for Touch 2.  But I'm thinking of making
it the default overall.

The support has been implemented for a while, but nobody has ever
really used the functionality. Time to remove it. Along with it
goes the --inline-examples option.

Touch 2 sources seem to contain no {@img} tags.

Using this will switch on the Touch-style examples page where
examples are shown inside iPhone/iPad images.

For now the option will also decide from where the icons for examples
are loaded: touch/examles or extjs/examples/shared/screens

There are now two implementations of example container:

- Container
- TouchContainer

Using this, JSDuck will automatically copy over images referenced
by {@img} tag.  No more need for extra copy task after running JSDuck.

Instead of reading in all files from SDK/touch/src dir - all these
files aren't really used by touch.

The classes list in Touch docs looks much more sensible now.

Add separate rake task :jsb for updating the file.

This is to make it possible to build docs app in a server that
doesn't allow running "sencha create jsb" command.

Renamed js_classes/ to js-classes/ to conform to the overall naming
convention.

Mostly useful for developers outside Sencha.

Created JsDuckRunner class inside the Rakefile to manage all the
options we are passign to JSDuck.

Instead of a myriad of different tasks, rake -D now only lists 4:

- sdk
- touch
- gem
- spec

sdk and touch tasks accept arguments to allow creation of live and
export versions. For example:

    $ rake sdk[live]