Add changelog.

Author: bakercp

CHANGELOG.md

@@ -0,0 +1,30 @@
+# Changelog
+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]
+### Removed
+- Remove the `void begin(unsigned long speed, size_t port)`.
+
+## [1.1.0] 2017-11-09
+### Added
+- Additional inline documentation.
+- Added doxygen configuration file.
+- Added CHANGELOG.md file.
+- Added the `void PacketSerial_::begin(unsigned long speed, uint8_t config, size_t port)` method to avoid confusion with the standard `Serial.begin(unsigned long speed, uint8_t config)`.
+
+### Changed
+- Updated README.md, fixed errors, spelling, byte counts, etc.
+
+### Removed
+- Deprecated the `void begin(unsigned long speed, size_t port)` method because it could be confused with the standard `Serial.begin(unsigned long speed, uint8_t config)` method.
+
+### Fixed
+- Fixed Duplicated SLIP END Packet #[11](https://github.com/bakercp/PacketSerial/issues/11)
+- Fix types to remove warnings in examples.
+- Add `const` qualifier to the `send()` method.
+
+### Security
+- None