Readme, License Fixes and another test added

circuits/sha256/main.circom

@@ -0,0 +1,50 @@
+
+/*
+include "sha256_2.jaz";
+
+component main = SHA256_2();
+*/
+
+/*
+include "constants.jaz"
+
+template A() {
+    signal input in;
+    component h0;
+    h0 = K(8);
+
+    var lc = 0;
+    var e = 1;
+    for (var i=0; i<32; i++) {
+        lc = lc + e*h0.out[i];
+        e *= 2;
+    }
+
+    lc === in;
+}
+
+component main = A();
+*/
+
+include "bitify.jaz"
+
+template A() {
+    signal input in;
+    signal output out;
+
+    component n2b;
+    component b2n;
+
+    n2b = Num2Bits(216);
+    b2n = Bits2Num(216);
+
+    n2b.in <== in;
+
+    for (var i=0; i<216; i++) {
+        b2n.in[i] <== n2b.out[i];
+    }
+
+    out <== b2n.out;
+}
+
+component main = A();