 blend between two values, using on a progress value

<p><a class="normal" href="GLZMath.html#Step">Step</a>: <a class="normal" href="GLZMath.html#Step">step</a> function

<p><a class="normal" href="GLZMath.html#SmoothStep">SmoothStep</a>: performs smooth Hermite interpolation between 0 and 1

<p>FMA: Fused Multiply and Add<h2 class="authors">Authors</h2>
<ul class="authors">
<li>J.Delauney (BeanzMaster)</li>
<li>P.Dyson (Dicped)</li>
</ul>
(R) 2017-2018 -- By J.Delauney and P.Dyson. Under MPL Licence
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