fix: config.ini

we can now do 'pecan serve ini/config.py'
the fully qualified path to config.ini must now
be set in config.py
I think the initial problem is there.
I was under the impression that ConfigObj required the absolute path to the .ini file. However, in the code above path_to_ini could still be a relative path.
Wouldn't the solution be:
config = ConfigObj(os.path.abspath(path_to_ini), interpolation=False)  
?