Added not equal universal function to tensor API

Author: andrewdalpino

CHANGELOG.md

@@ -1,4 +1,6 @@
 - Unreleased
+
+- 1.0.2
     - Added ref using row elimination method
     - Added universal comparison methods to tensor API
     - Added convolve operation to Vector and Matrix

src/Tensor.php

@@ -106,6 +106,16 @@ public function mod($b);
      */
     public function equal($b);
 
+    /**
+     * A universal function to compute the not equal comparison of
+     * this tensor and another tensor element-wise.
+     *
+     * @param  mixed  $b
+     * @throws \InvalidArgumentException
+     * @return mixed
+     */
+    public function notEqual($b);
+
     /**
      * A universal function to compute the greater than comparison of a
      * tensor and another tensor element-wise.