changelog update

CHANGELOG.md

 # Changelog
 All notable changes to this project will be documented in this file.
 
-## [1.0.1]
+# [Unrealsed]
 
-## Changed
+### Added
+
+* Tutorial
+* Conda v4.8.2 envs
+
+### Changed
+
+* upgrade snakemake to v5.19.2
+* new structure for distribution based on snakemake recommandation [here](https://snakemake.readthedocs.io/en/v5.19.2/snakefiles/deployment.html)
+
+## [1.0.1] - 14th june 2020
+
+### Changed
 
 * Absolute path of all_samples.tsv into config.yaml
 * Remove redundant paramters into config.yaml