using IRunnableContext for retrieving BuildTargetTreeNode input so progress dialog can be displayed for wizards or in the status bar when on the UI thread (e.g. ManageConfigurationsDialog)
Removes API in BuildTargetTreeNode that presumed all nodes were SBSv1 (didn't appear to be used anywhere)
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" path="src"/>
<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5"/>
<classpathentry kind="output" path="bin"/>
</classpath>