Standardize documentation of Speed Controllers bounds (#2043)

Some were in constructor docs, some in init function docs, and some
inline in code. Move them all to class docs.

wpilibc/src/main/native/cpp/SD540.cpp

@@ -14,19 +14,6 @@
 using namespace frc;
 
 SD540::SD540(int channel) : PWMSpeedController(channel) {
-  /* Note that the SD540 uses the following bounds for PWM values. These values
-   * should work reasonably well for most controllers, but if users experience
-   * issues such as asymmetric behavior around the deadband or inability to
-   * saturate the controller in either direction, calibration is recommended.
-   * The calibration procedure can be found in the SD540 User Manual available
-   * from Mindsensors.
-   *
-   *   2.05ms = full "forward"
-   *   1.55ms = the "high end" of the deadband range
-   *   1.50ms = center of the deadband range (off)
-   *   1.44ms = the "low end" of the deadband range
-   *   0.94ms = full "reverse"
-   */
   SetBounds(2.05, 1.55, 1.50, 1.44, .94);
   SetPeriodMultiplier(kPeriodMultiplier_1X);
   SetSpeed(0.0);