ContinousStepper 3.1.0

* Add `acceleration()` getter
* Add `isPowered()` (issue #17)

ContinuousStepper 3.0.2

* Respect `tone()`'s minimum frequency (issue #14)
* Ignore repeated calls to `spin()` with the same values (issue #14)

ContinuousStepper 3.0.1

* Fix ticker includes in examples (was `.h` instead of `.hpp`)

ContinuousStepper 3.0.0

* Remove deprecated 3-parameter `begin()`
* Add support for four-wire stepper motors
* `ContinuousStepper` is now a template class
* Add `ContinuousStepper.hpp` that keeps everything in the namespace
* Some include files have been renamed

ContinuousStepper 2.2.0

* Fix occasional missed ticks on timer-based implementations
* Add `ContinuousStepper_Tone` which uses `tone()` instead of `digitalWrite()` for the step pin
* Add `ContinuousStepper_AWF` which uses `analogWriteFrequency()` on Teensy 3 and 4
* Add `ContinuousStepper_KhoiH` which uses Khoi Hoang's PWM libraries

ContinuousStepper 2.1.0

* Set *dir* pin level only when it changes (used to be on each tick)
* Fix acceleration bug after reversing the rotation (issue #7)
* Add `setEnablePin()` and allow inverting the pin's level (issue #6)
* Stop timer when `powerOff()` is called

ContinuousStepper 2.0.0

ContinuousStepper 1.2.0

ContinuousStepper 1.1.1

ContinuousStepper 1.1.0