Use DAT info files

[Asnivor]

From @retro-wertz

-gamesdb seems to be really slow(not to mention i have a slow internet) and srapping just my 2000+ library of nes games took me almost an hour (including scrapping for already scrapped data from before the update) that i had to cancel it. its just slow even just getting the basic info of the game(like for the necessary entry in the table). have you considered using DAT's that are available like from TOSEC, ReDump, NoIntro etc to fill-in the basic info like game name, publisher, year etc? this way its a local copy and it has even crc/sha1 values for each rom to exactly match them to the rom you have and possibly give it proper name than the filename you have.

Need to look into the best way to implement this (potentially).

[Asnivor]

In next release