cmake remove circular linking and reorganize

- px4_add_module now requires MAIN
 - px4_add_library doesn't automatically link

src/examples/uuv_example_app/CMakeLists.txt

@@ -37,6 +37,4 @@ px4_add_module(
 	SRCS
 		uuv_example_app.cpp
 	DEPENDS
-		platforms__common
 	)
-# vim: set noet ft=cmake fenc=utf-8 ff=unix : 

src/examples/uuv_example_app/uuv_example_app.cpp

@@ -51,9 +51,9 @@
 #include <math.h>
 
 // system libraries
-#include <systemlib/param/param.h>
+#include <parameters/param.h>
 #include <systemlib/err.h>
-#include <systemlib/perf_counter.h>
+#include <perf/perf_counter.h>
 #include <systemlib/systemlib.h>
 #include <systemlib/circuit_breaker.h>
 // internal libraries