Merge branch 'check-if-moving' into 'master'

Support for blocking stage moves.

Closes #1

See merge request filipayazi/sangaboard-firmware!1

test/test_blocking_moves.py

@@ -0,0 +1,33 @@
+import sangaboard
+import time
+
+def polling_move(sb, pos):
+    positions = []
+    sb.move_rel(pos)
+    while sb.query("moving?") == "true":
+        positions.append((time.time(), sb.position))
+        time.sleep(0.001)
+    return positions
+
+def blocking_move(sb, pos):
+    positions = []
+    sb.move_rel(pos)
+    sb.query("notify_on_stop")
+    return positions
+
+if __name__ == "__main__":
+    sb = sangaboard.Sangaboard()
+
+    durations = []
+    for i in range(10):
+        start = time.time()
+        m = polling_move(sb, [1000 * (-1)**i, 0, 0])
+        stop = time.time()
+        durations.append(stop-start)
+
+    durations = []
+    for i in range(10):
+        start = time.time()
+        m = blocking_move(sb, [1000 * (-1)**i, 0, 0])
+        stop = time.time()
+        durations.append(stop-start)