Cleaned up Wisard Page by removing unneccessary code, and referenced from examples. Issue #3
Updated the model for the general wizard page to provide access to a
list of keys and a list of values.  May not be used however, was needed
for placeholder workflow logic. Issue #2
Cleanup for issue #3
Updates to support issue #2 with the inclusion of skeleton code to
support operations on data held within the model.
Added setEnable(boolean) call to buttons. Issue #3
Forgot to add a wizard for adding variables. Update to support issue #4
Also needed to add a model for add view. Issue #10
Added a reference to the incoming DataBindingContext instance. (may not
be used.) Issue #3
Some more cleanup to support further view editing. Issue #3
Created a new OKCancelButtonDialog for use within the dialog views of
the wizard.  also added use of this new dialog to the onAdd() method.
Issue #3
Moved code around. Issue #4
Updated the onAdd() method to call the new OKCancelButtonWizardDialog and moved around some source code. Issue #4
Update for issue #3 to support integration with JBIDE-15597. Three methods for accessing Environmental Variables via the ApplicationConfigurationPageModel and ApplicationConfigurationPage objects.