Mostly working cross-compile task.

Analyzer plugin is now a proper internal phase to get around bootstrapping issues.
Correctly handle source tags.

interface/src/main/java/xsbti/AnalysisCallbackContainer.java

@@ -1,12 +0,0 @@
-/* sbt -- Simple Build Tool
- * Copyright 2009  Mark Harrah
- */
-package xsbti;
-
-/** Provides access to an AnalysisCallback.  This is used by the plugin to
-* get the callback to use.  The scalac Global instance it is passed must
-* implement this interface. */
-public interface AnalysisCallbackContainer
-{
-	public AnalysisCallback analysisCallback();
-}