standardize a configuration structure.

[notbenh]

Currently we are using ENV to store the locations of all interpreters for solutions. It has been suggested that moving forward a config file would be a more flexible solution.

[leto]

Config file should override env variables.

[notbenh]

conf file should only be used to map lanugage to an array of intrep.

[notbenh]

ok so bench currently has a config file, the format has changed since the last time i pushed but it will now allow us to start packing more info based on the keyword. Bench still does not even bother with env vars, should this be added back in?