Removed unrequired dependency on com.ibm.icu
Added com.ibm.icu.base plugin to the feature dependencies
Increased memory for webstart maven build batch file
Adding a dispatch handler for Layer objects (closes #62)
Removing dependency on SharedImages generator
Cleaned up the Activator class
Added a copy of the ChooseWorkspaceDialog class from the eclipse.ui.ide plugin
Updated the earthsci.application plugin's Activator to subclass AbstractUIPlugin
Added workspace locking (fixes #60)
Fixing broken unit test
Added PreferencePage class, and edited FieldEditorPreferencePage javadoc