Fix install issues in readme

[mgkwill]

Objective of issue: Fix install issues in readme

Lava version:

• 0.2.0 (current version)

I'm submitting a ...

• bug report
• documentation request

Current behavior:

• Install docs are not up to date and do not support successful install.

Expected behavior:

• Install docs are not up to date and do not support successful install.

[SveaMeyer13]

Hi @mgkwill,

I think the installation instruction would also need to be updated in the first tutorial.
These are the issues I encountered when trying to install on Windows:

• For windows we need to get rid of "source" in the command for activating the venv. I can activate the environment when running python3_venv\Scripts\activate.bat
• When running pip install -e . PyBuilder fails and the first exception there is:

 File "C:\Users\sveamari\PycharmProjects\lava\python3_venv\lib\site-packages\pip\_vendor\pep517\in_process\_in_process.py", 
line 156, in prepare_metadata_for_build_wheel                                             
hook = backend.prepare_metadata_for_build_wheel 
AttributeError: module 'pybuilder.pep517' has no attribute 'prepare_metadata_for_build_wheel'  

[mgkwill]

Hi @SveaMeyer13. Thanks for letting me know. I was already working on the issue and solved it with the latest release.

Please try again with the updated install instructions: https://github.com/lava-nc/lava/blob/main/README.md#windows