Update CHANGELOG.md

Author: darcato

CHANGELOG.md

@@ -6,12 +6,23 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
-## [1.1] - 2017-12-15
+## [2.0.0] - 2018-01-25
+### Changed
+- HUGE performance inprovements, especially when using multiple axes. The poll method has been completely rewritten to minimize network access. Now a single modbus I/O is executed per each poll (in the controller poll) to update the position and status of all the axes, requiring just about 15-20ms, instead of about 70-100ms per axis. This enables much faster movement startup.
+- beckDriver now implements asynInt32Array to read/write values from multiple modules at the same time.
+- now using modbus absolute addressing to have syncronous readings.
+### Fixed
+- fixed wrong record value at startup
+- fixed multiple errors printings at startup
+- fixed moving reporting to motor record to set polling period
+- other bug fixes
+
+## [1.1.0] - 2017-12-15
 ### Added
 - Implemented STOP function
 - Small efficiency improvements
 
-## [1.0] - 2017-05-24
+## [1.0.0] - 2017-05-24
 ### Added
 - First release
 - Position control movements