Add CHANGELOG and prepare the next release

Signed-off-by: VirtualTam <[email protected]>

CHANGELOG.rst

@@ -0,0 +1,51 @@
+Change Log
+==========
+
+All notable changes to this project will be documented in this file.
+
+The format is based on `Keep a Changelog`_ and this project adheres to
+`Semantic Versioning`_.
+
+.. _Keep A Changelog: http://keepachangelog.com/
+.. _Semantic Versioning: https://semver.org/
+
+`v2.0.0 <https://github.com/virtualtam/ccache_exporter/releases/tag/v2.0.0>`_ - UNPUBLISHED
+-------------------------------------------------------------------------------------------
+
+Major refactoring.
+
+**Added**
+
+- Allow to specify the path to the ccache binary
+- Setup promu from cross-platform exporter builds
+- Add license information to all Go source headers
+- Document all exported types and methods
+
+**Changed**
+
+- Explicitly handle or silence errors
+- Relocate parser code to this repository
+- Refactor and simplify parser tests by switching to table-driven testing
+- Refactor the codebase to adopt a flat package structure, with more idiomatic
+  type and method names
+- Trim build paths
+
+`v1.1.0 <https://github.com/virtualtam/ccache_exporter/releases/tag/v1.1.0>`_ - 2018-10-20
+------------------------------------------------------------------------------------------
+
+**Changed**
+
+- Add support for ccache 3.5
+- Setup out-of-tree builds
+
+`v1.0.0 <https://github.com/virtualtam/ccache_exporter/releases/tag/v1.0.0>`_ - 2018-10-09
+------------------------------------------------------------------------------------------
+
+Initial release.
+
+**Added**
+
+- Setup Go project with module support
+- Gather metrics  from local ccache statistics
+- Export Go, scraping and ccache metrics under ``/metrics``
+- Setup a sandbox Docker Compose monitoring environment with Node Exporter, Prometheus and Grafana