Compiler update (#21)

* added seperate folders for cmd packages.

* Fix netmodes in test + reverse bigint bytes

* glide get deps

* add, sub, mul, div

* booleans

* strings

* binary expressions

* if statements

* function calls

* composite literals (slice, array)

* Added lots of test cases and update readme.

pkg/util/uint256_test.go

@@ -1 +1,25 @@
 package util
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestToArrayReverse(t *testing.T) {
+	arr := []byte{0x01, 0x02, 0x03, 0x04}
+	have := ToArrayReverse(arr)
+	want := []byte{0x04, 0x03, 0x02, 0x01}
+	if bytes.Compare(have, want) != 0 {
+		t.Fatalf("expected %v got %v", want, have)
+	}
+}
+
+// This tests a bug that occured with arrays of size 1
+func TestToArrayReverseLen2(t *testing.T) {
+	arr := []byte{0x01}
+	have := ToArrayReverse(arr)
+	want := []byte{0x01}
+	if bytes.Compare(have, want) != 0 {
+		t.Fatalf("expected %v got %v", want, have)
+	}
+}