Giving analyzer/ its own CMakeLists.txt.

Also moving src/analyzer.bif to src/analyzer/analyzer.bif, along with
the infrastructure to build/incude bif code at other locations.

We should generally move to having per-directory CMakeLists.txt. I'll
convert the others over later.

src/analyzer/Manager.h

@@ -29,6 +29,8 @@
 #include "../net_util.h"
 #include "../IP.h"
 
+#include "analyzer/analyzer.bif.h"
+
 namespace analyzer {
 
 /**
@@ -59,6 +61,12 @@ public:
 	 */
 	void Init();
 
+	/**
+	 * Initializes the analyze-related BiFs. Must be called after scripts
+	 * are parsed.
+	 */
+	void InitBifs();
+
 	/**
 	 * Finished the manager's operations.
 	 */