add zstandard

development.md

@@ -14,8 +14,10 @@ python src/run.py
 ```
 
 ## Building from source
-If you want to build a .exe from source you will have to first add the cv2 path to your PYTHONPATH:</br>
-Edit System environment variables -> Enfironment Vriables... -> PYTHONPATH -> C:\Users\\$USER\miniconda3\envs\botty\lib\site-packages\cv2
+If you want to build a .exe from source you will have to first add the cv2 path to your PYTHONPATH to System variables or User variables for current user:</br>
+Edit the system environment variables -> Environment Variables... -> New... 
+Variable name: PYTHONPATH 
+Variable value: C:\Users\%USERPROFILE%\miniconda3\envs\botty\Lib\site-packages\cv2 
 ```python
 # building .exe and bundeling all needed resource into one folder
 python release.py

environment.yml

@@ -14,3 +14,4 @@ dependencies:
     - keyboard
     - graphviz
     - beautifultable
+    - zstandard