Update readme

Author: balexei

README.md

@@ -62,3 +62,26 @@ Methods
     * **enable**: _bool_ enables/disables suction
 * **.grip(enable)**
     * **enable**: _bool_ enables/disables gripper
+* **.wait(ms)**
+    * **ms**: _integer_ milliseconds to wait before the next command
+    * **wait**: _bool_ waits until command has been executed to return to process
+* **.start_stepper(pps, motor=0, wait=False)**
+    * **pps**: _integer_ pulses per second sent to e-motor (0 or 1)
+    * **motor**: _integer_ position of the e-motor
+    * **wait**: _bool_ waits until command has been executed to return to process
+* **.stop_stepper(motor=0, wait=False)**
+    * **motor**: _integer_ position of the e-motor (0 or 1)
+    * **wait**: _bool_ waits until command has been executed to return to process
+* **.start_conveyor(speed, motor=0, wait=False)**
+    * **speed**: _float_ speed in m/s
+    * **motor**: _integer_ position of the conveyor belt (0 or 1)
+    * **wait**: _bool_ waits until command has been executed to return to process
+* **.set_io_mode(address, mode, wait=False)**
+    * **address**: _integer_ EIO port number
+    * **mode**: _str_ I/O mode (Dummy, PWM, DO, DI, ADC)
+    * **wait**: _bool_ waits until command has been executed to return to process
+* **.set_pwm_output(address, frequency, duty_cycle, wait=False)**
+    * **address**: _integer_ EIO port number
+    * **frequency**: _float_ pulse frequency
+    * **duty_cycle**: _float_ pulse duty cycle (0 to 100)
+    * **wait**: _bool_ waits until command has been executed to return to process