Add a few examples

examples/assignment.rhai

@@ -0,0 +1,2 @@
+var x = 78
+print(x)

examples/function_decl1.rhai

@@ -0,0 +1,5 @@
+fn bob() {
+    3
+}
+
+print(bob())

examples/function_decl2.rhai

@@ -0,0 +1,5 @@
+fn addme(a, b) {
+    a+b
+}
+
+print(addme(3, 4))

examples/if1.rhai

@@ -0,0 +1,5 @@
+var a = true;
+if (a) {
+    var x = 56;
+    print(x);
+}

examples/op1.rhai

@@ -0,0 +1 @@
+print(34 + 12)

examples/op2.rhai

@@ -0,0 +1 @@
+print(12 + 34 * 5)

examples/op3.rhai

@@ -0,0 +1 @@
+print(0 + (12 + 34) * 5)

examples/speed_test.rhai

@@ -0,0 +1,5 @@
+var x = 1000000;
+while x > 0 {
+    x = x - 1;
+}
+print(x);

examples/while.rhai

@@ -0,0 +1,6 @@
+var x = 10;
+
+while x > 0 {
+    print(x);
+    x = x - 1;
+}