v.3.2.0

In this release some function names have been changed to more relative ones, and function of getting presets has been assigned to the Gradientify element to make it possible to call it outside the library scope. This function now supports callback, so when the presets are loaded - the callback is called.
Thanks to that we are sure that the presets are loaded only once, and we can call function to load our gradients from the presets when the callback has been fired.