refactor(slots): Improve Slots Implementations (#92)

- Further decouple OS code from IoT code.
- Add missing ESP8266 functionality.
- Allow removal of lib/STL dependency.
  - STL lib is only included to provide a conv. method for IoT to use date.h
  - date.h is now only used by OS builds, which will have the STL by default.
- update changelog.
- add PIO filters for lib/date.

Author: sleepdefic1t

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Changed
+
+- improved Slots implementations ([#92])
+
 ## [0.5.0] - 2019-02-20
 
 ### Changed

platformio.ini

@@ -13,9 +13,9 @@ description = "A simple Cryptography Implementation in C++ for the ARK Blockchai
 
 [common]
 lib_ldf_mode = off
-lib_deps = micro-ecc, bip39@^1.1, ArduinoJson@6.10.0, BIP66
+lib_deps = micro-ecc, ArduinoJson@6.10.0, BIP66
 build_flags = -I./src/ -I./src/lib -I./src/include/cpp-crypto
-src_filter = +<*> -<.git/> -<examples/> -<lib/ArduinoJson>-<lib/uECC> -<CMakeFiles> -<lib/BIP66>
+src_filter = +<*> -<.git/> -<examples/> -<lib/ArduinoJson> -<lib/uECC> -<CMakeFiles> -<lib/BIP66> -<lib/date>
 upload_speed = 921600
 
 [env:esp8266]

src/helpers/crypto_helpers.h

@@ -1,4 +1,11 @@
-
+/**
+ * This file is part of Ark Cpp Crypto.
+ *
+ * (c) Ark Ecosystem <info@ark.io>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ **/
 
 #ifndef CRYPTO_HELPERS_H
 #define CRYPTO_HELPERS_H
@@ -17,17 +24,9 @@ const auto WIF_SIZE = 52u;
 
 #define USE_IOT
 
-// Including missing implementations of std::to_string
-#include "stl/details/to_string.h"
-
 #include <Arduino.h>
 #include <pgmspace.h>
 
-// undef the C macros to allow the C++ STL to take over
-// This is to have compatibility with various board implementations of the STL
-#undef min
-#undef max
-
 #endif
 
 // Write data into dst