More work on the interface to add/remove file analysis actions.

Added the file extraction action and did other misc. cleanup.  Most of
the minimal core features/support for file analysis should be working at
this point, just have to start fleshing things out.

src/FileAnalyzer.h

@@ -16,6 +16,8 @@ public:
 
 	virtual void DeliverStream(int len, const u_char* data, bool orig);
 
+	void Undelivered(int seq, int len, bool orig);
+
 	static Analyzer* InstantiateAnalyzer(Connection* conn)
 		{ return new File_Analyzer(conn); }