cmake remove circular linking and reorganize

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

src/examples/segway/CMakeLists.txt

@@ -40,6 +40,5 @@ px4_add_module(
 		segway_main.cpp
 		BlockSegwayController.cpp
 	DEPENDS
-		platforms__common
 	)
-# vim: set noet ft=cmake fenc=utf-8 ff=unix :
+

src/examples/segway/params.c

@@ -1,4 +1,4 @@
-#include <systemlib/param/param.h>
+#include <parameters/param.h>
 
 // 16 is max name length
 PARAM_DEFINE_FLOAT(SEG_TH2V_P, 10.0f); // pitch to voltage

src/examples/segway/segway_main.cpp

@@ -45,7 +45,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <systemlib/systemlib.h>
-#include <systemlib/param/param.h>
+#include <parameters/param.h>
 #include <systemlib/err.h>
 #include <drivers/drv_hrt.h>
 #include <math.h>