instructions for installing an environment

[haluk]

• I had to specify certain versions for some packages that are updated in the requirements.txt to be able to run the examples.
• I created Makefile to run creating a virtual environment within the project folder, to clean up log and pycache files.
• If direnv is installed, it automatically activates the virtual environment located in the project folder using .envrc upon entering the project folder.

[haluk]

We need to delete .python-version line from .gitignore. It uses this file to create the environment.