Update README and add LeakyReLU circuit and test

test/LeakyReLU.js

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+const chai = require("chai");
+const path = require("path");
+
+const wasm_tester = require("circom_tester").wasm;
+
+const F1Field = require("ffjavascript").F1Field;
+const Scalar = require("ffjavascript").Scalar;
+exports.p = Scalar.fromString("21888242871839275222246405745257275088548364400416034343698204186575808495617");
+const Fr = new F1Field(exports.p);
+
+const assert = chai.assert;
+
+describe("LeakyReLU layer test", function () {
+    this.timeout(100000000);
+
+    it("3 nodes", async () => {
+        const circuit = await wasm_tester(path.join(__dirname, "circuits", "LeakyReLU_test.circom"));
+
+        const INPUT = {
+            "in": [Fr.e(-11),"0","3"],
+            "out": [Fr.e(-4),"0","3"],
+            "remainder": ["7","0","0"]
+        }
+
+        const witness = await circuit.calculateWitness(INPUT, true);
+
+        assert(Fr.eq(Fr.e(witness[0]),Fr.e(1)));
+    });
+});

test/circuits/LeakyReLU_test.circom

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+pragma circom 2.0.0;
+
+include "../../circuits/LeakyReLU.circom";
+
+template leaky_relu_test() {
+    signal input in[3];
+    signal input out[3];
+    signal input remainder[3];
+
+    component leaky_relu[3];
+
+    for (var i=0; i<3; i++) {
+        leaky_relu[i] = LeakyReLU(3);
+
+        leaky_relu[i].in <== in[i];
+        leaky_relu[i].out <== out[i];
+        leaky_relu[i].remainder <== remainder[i];
+    }
+}
+
+component main = leaky_relu_test();