utf-8 decode error due to the presence of __pycache__ folder in the template directory

[StephaneCapponi]

What is the issue?
When we install socon from the pip installer, pip create pycache folders in the template directory with different files.
When socon try to create a container for example, it will see these files and will try to render them. This cause a decode error in most of the cases.

Error is the following:
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd9 in position 9: invalid continuation byte