Added mt_config_node.cc/hh
Started updating configuration-related classes (incomplete)
Config system now working.
Adapted the rest of mantis to the new system.
Changed config class names.
config interface changes
fixes missing from last commit
renamed param_data to param_value.
renamed config_maker_json to param_input_json.
Updated the README
Arrays work too, now.
Merge branch 'config' into client