Generate .pyc files during Cohorte installation

[tcalmant]

After having copied .py files, the administrator or the setup script should run the compileall standard module to generate Cohorte .pyc files while running with privileges.

This would avoid an instance of Cohorte to have writing rights on the "home" folder, and would allow sharing safely the latter between various Cohorte bases.

This should be done for both Python 2 and 3, or using the interpreter set by the administrator.

Example:

python -m compileall "$COHORTE_HOME"