break out cipher primitives, add unit tests

git-svn-id: http://encfs.googlecode.com/svn/trunk@94 db9cf616-1c43-0410-9cb8-a902689de0d6

cipher/StreamCipher.cpp

@@ -0,0 +1,20 @@
+#include "cipher/StreamCipher.h"
+
+namespace encfs {
+
+Registry<StreamCipher>& StreamCipher::GetRegistry()
+{
+  static Registry<StreamCipher> registry;
+  return registry;
+}
+
+StreamCipher::StreamCipher()
+{
+}
+
+StreamCipher::~StreamCipher()
+{
+}
+
+}  // namespace encfs
+