Read/Write string-string dictionary

[eugeneloza]

To load stuff like fonts, and to operate string-string-> font conversions.
Usually such dictionary would provide "GameDescription" - "Class" interaction, where multiple "GameDescriptions" may reference a single "Class".
Yes, this requires modifying the logic behind all that, thou it's not so difficult (at least at the current stage).

[eugeneloza]

Also for "Name" - "URL" operation

[eugeneloza]

Just checked, those aren't used yet. Should make it happen :)