ImportPayout cc eval code and alot of general cc polish. tests to write

src/cc/eval.cpp

@@ -0,0 +1,23 @@
+#include "primitives/transaction.h"
+#include "komodo_cc.h"
+#include "cc/eval.h"
+#include <cryptoconditions.h>
+
+
+/*
+ * Test the validity of an Eval node
+ */
+bool EvalConditionValidity(const CC *cond, const CTransaction *txTo, int nIn)
+{
+    if (strcmp(cond->method, "testEval") == 0) {
+        return cond->paramsBinLength == 8 &&
+            memcmp(cond->paramsBin, "testEval", 8) == 0;
+    }
+
+    if (strcmp(cond->method, "ImportPayout") == 0) {
+        return CheckImportPayout(cond, txTo, nIn);
+    }
+
+    fprintf(stderr, "no defined behaviour for method: %s\n", cond->method);
+    return 0;
+}