Better solution for EXML navigation:
instead of tweaking the getDeclaration() method of XmlTag,
the new solution uses an official IDEA extension point,
providing a custom GotoDeclarationHandler that finds the
EXML files or ActionScript files that define(s) the EXML element.
This does not yet fully re-add the feature to find usages of an
EXML file, which used to work before IDEA 13, but at least allows
to find *other* usages of an EXML element or usages of the
corresponding XSD definition element.
Fix: avoid NPE in JS "create no-arg constructor fix" inspection

Don't generate super call with one parameter since sometimes,
the superclass does not have one. Leaving out the super call when
the superclass has no no-arg constructor (or the first parameter is
not optional) is incorrect, too, but does not seem to cause any harm.
merge overwritten KnowMetaData.dtd with updates from IDEA 13
Added custom Jangaroo Event types to make [Event] annotations green in IDEA:
* js.Event: browser events defined in jangaroo-browser
* ext.IEventObject: Ext JS events defined in ext-as
* com.coremedia.ui.data.PropertyChangeEvent: CoreMedia UI-Toolkit property change events
Back to old behavior where to set the Jangaroo SDK.
Temporarily, we used the module SDK to transport the Jangaroo SDK and its home path to JPS.
However, this no longer allows mixing Java and Jangaroo code within one module (which is not
a good idea, but used to be possible), and does not fit the concept of an IDEA Facet that should
add an aspect to a module, not re-interpret a module setting. We could have made a custom
Jangaroo module type, but if Jangaroo settings are in a Facet, all of them should be in there.
That said, I changed the Jangaroo JPS plugin to retrieve the JpsSdk from the name stored in the
Jangaroo Facet (it was not so easy to find out how to retrieve a JpsSdk by name, but finally
managed to do so using only public IDEA API). Setting the module SDK in JangarooFacetImporter
is no longer necessary and has been removed.
So now, the overall behavior on Maven-importing and building is very similar to how it was in IDEA 12.

On the fly, fixed that the JPS plugin tried to compile all ActionScript and EXML code, even when
there is now Jangaroo-/EXML-Facet. The reason was that JangarooModelSerializerExtension returned
an empty configuration if none was found, so that every module looked like it had a facet.
Now, existence of the corresponding Facet is checked first, and files from modules that do not have
the corresponding Facet are silently skipped. Also, an error is reported if an EXML Facet comes
without a Jangaroo Facet.
fixed plugin project configuration: no need to build a jps JAR artifact if we mind to include MANIFEST.MF into compiler output
Feature: navigate from EXML config option attributes or elements to their declaration.

Refactored element navigation to also use the resolved XSD element.
Unfortunately, IDEA sometimes fails to resolve the XSD element, namely for inherited
config options of nested elements.
Feature: navigate from a usage of a localization property to its declaration in a *.properties file.

The propc compiler translates *.properties files to ActionScript ResourceBundle classes.
You can now navigate from an ActionScript or EXML usage directly to the source
*.properties file instead of being directed to the generated AS class.
The custom GotoDeclarationHandler offers all localized variants as navigation targets,
so that you can jump to your preferred language.
You can also navigate to the *.properties file by invoking Ctrl-B at a
ResourceBundle's INSTANCE access.

The new feature adds a dependency on the (bundled) "properties" IDEA plugin.
Add [PublicApi] to IDEA's known meta data.
Also added Jangaroo-specific documentation for [ExcludeClass].
Added two IDEA plugin dependencies without which the Jangaroo IDEA plugin technically works, but not very well:
* Flex plugin for the real ActionScript support
* Maven-ext plugin for building correct artifacts
release net.jangaroo.idea.0.9 version 0.26
prepare for next development iteration