added option for weak-field GR time dilation

Author: BuckRogers1965

docs/index.html

@@ -36,6 +36,7 @@ <h1>LawForge</h1>
                         <option value="E ~ m">Mass-Energy Equivalence</option>
                         <option value="F ~ M1*M2/r**2">Newtonian Gravity</option>
                         <option value="r_s ~ M">Schwarzschild Radius</option>
+                        <option value="t ~ m /(r* t_P)">weak-field GR time dilation</option>
                     </optgroup>
                     <optgroup label="Quantum Mechanics">
                         <option value="E ~ f">Planck-Einstein Relation</option>