Mapping ordered list and fix for special chars bug in array keys

[ldim87]

Implemented better mappings from "mrphang" repo so you can specify your folders in particular order via list (instead of dict) as such: "path_mapping": [ ["/path/1/on/remote", "/path/1/on/local"], ["/path/2/on/remote", "/path/2/on/local"], ]

Also, fixed utf special character in array keys. This error has been suppressed: Length mismatch encountered while reading the Xdebug message