PositionDeadband, dynamic limit detection, velocity mode

Integrated a readout function for the position deadband. Also read from
the controller if the axis has dynamic limits and only poll the limits
repeatedly if that is the case. Lastly, added support for the velocity
mode (untested!).

src/masterMacsAxis.h

@@ -51,6 +51,19 @@ class HIDDEN masterMacsAxis : public sinqAxis {
      */
     asynStatus doPoll(bool *moving);
 
+    /**
+     * @brief Implementation of the `doMoveVelocity` function from sinqAxis. The
+     * parameters are described in the documentation of
+     * `sinqAxis::doMoveVelocity`.
+     *
+     * @param minVelocity
+     * @param maxVelocity
+     * @param acceleration
+     * @return asynStatus
+     */
+    asynStatus doMoveVelocity(double minVelocity, double maxVelocity,
+                              double acceleration);
+
     /**
      * @brief Implementation of the `doMove` function from sinqAxis. The
      * parameters are described in the documentation of `sinqAxis::doMove`.
@@ -154,6 +167,12 @@ class HIDDEN masterMacsAxis : public sinqAxis {
      */
     asynStatus readAxisStatus();
 
+    /**
+     * @brief Read the upper and lower limits and store them in the parameter
+     * library.
+     */
+    asynStatus readLimits();
+
     /*
     The functions below read the specified status bit from the axisStatus (see
     masterMacsAxisImpl redefinition in masterMacsAxis.cpp) bitset. Since a bit