fixed some issues

added new pose/turn detections
new helper classes
define-flags for libEigen

sensors/imu/TurnProvider.h

@@ -0,0 +1,12 @@
+#ifndef TURN_PROVIDER_H
+#define TURN_PROVIDER_H
+
+class TurnProvider {
+
+public:
+
+	virtual float getSigma() const = 0;
+
+};
+
+#endif // TURN_PROVIDER_H