Fix typos in guide found by @epragt
A few more guide typos fixed thanks to @pledbrook and @bodiam
Add more default artifacts to lazybones templates
Add default artifacts for ApplicationModule and ApplicationEventHandler to Lazybones templates
Fix argument passing on AbstractJavaFXGriffonApplication
Fix Javafx templates
Add doc entries on threading
Configure classpath for eclipse
use spock-core:0.7-groovy-1.8 for gradle-griffon-plugin

gradle 1.12 still uses groovy 1.8.
added unit tests for gradle-griffon-plugin
removed method applyPluginIfAbsent

This method was simply not necessary: The javadoc of PluginContainer.apply
says: "Applies a plugin to the project. This usually means that the plugin
uses the project API to add and modify the state of the project.
This method can be called an arbitrary number of times for a particular
plugin type. The plugin will be actually used only the first time this
method is called."
Merge pull request #19 from tschulte/feature/eclipse

Feature/eclipse
Add Model details to guide
Merge branch 'development' of github.com:griffon/griffon into development
Fix typos in guide found by @epragt
A few more guide typos fixed thanks to @pledbrook and @bodiam
Add more default artifacts to lazybones templates
Add default artifacts for ApplicationModule and ApplicationEventHandler to Lazybones templates
Fix argument passing on AbstractJavaFXGriffonApplication
Fix Javafx templates