message: stealth address prefix change
diff: @@ -229,7 +229,7 @@ public:
  base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,70);
  base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,5);
  base58Prefixes[SECRET_KEY] = std::vector<unsigned char>(1,128);
  - base58Prefixes[STEALTH_ADDRESS] ={0x14}; // todo
  + base58Prefixes[STEALTH_ADDRESS] ={0x84}; // v
  base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x88, 0xB2, 0x1E};
  base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x88, 0xAD, 0xE4};
  @@ -345,7 +345,7 @@ public:
  base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
  base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
  base58Prefixes[SECRET_KEY] = std::vector<unsigned char>(1,239);
  - base58Prefixes[STEALTH_ADDRESS] = {0x15}; // T
  + base58Prefixes[STEALTH_ADDRESS] = {0x84}; // v
  base58Prefixes[EXT_PUBLIC_KEY] = {0x04, 0x35, 0x87, 0xCF};
  base58Prefixes[EXT_SECRET_KEY] = {0x04, 0x35, 0x83, 0x94};
  