Decimal time face (#260)

* Update movement_faces.h

adding decimal_time_face.h to build

* Decimal Time, a new clock face

This face presents the current time as hours and hundredths of an hour.

* add decimal time to Makefile

movement/movement_faces.h

@@ -93,6 +93,7 @@
 #include "dual_timer_face.h"
 #include "simple_clock_bin_led_face.h"
 #include "flashlight_face.h"
+#include "decimal_time_face.h"
 #include "wyoscan_face.h"
 // New includes go above this line.