Levelization, improve structure of source files:

Source files are moved between modules, includes changed and added,
and some code rewritten, with the goal of reducing cross-module dependencies
and eliminating cycles in the dependency graph of classes.

* Remove RippleAddress dependency in CKey_test
* ByteOrder.h, Blob.h, and strHex.h are moved to basics/. This makes
  the basics/ module fully independent of other ripple sources.
* types/ is merged into protocol/. The protocol module now contains
  all primitive types specific to the Ripple protocol.
* Move ErrorCodes to protocol/
* Move base_uint to basics/
* Move Base58 to crypto/
* Remove dependence on Serializer in GenerateDeterministicKey
* Eliminate unity header json.h
* Remove obsolete unity headers
* Remove unnecessary includes

src/ripple/protocol/JsonFields.h

@@ -20,6 +20,8 @@
 #ifndef RIPPLE_PROTOCOL_JSONFIELDS_H_INCLUDED
 #define RIPPLE_PROTOCOL_JSONFIELDS_H_INCLUDED
 
+#include <ripple/json/json_value.h>
+
 namespace ripple {
 namespace jss {