Update Turkish lira currency code

[lebedevsergey]

Since 2005 Turkish lira currency code has changed from TRL to TRY, let's keep it up to date!

[StudioMaX]

Not sure if it will be correct to just replace the old currency code with the new one, as this will break compatibility with the old tags, in which the old currency code was specified. Perhaps it is worth specifying both the old and the new code for the same currency? Or change it to something like "Liras (before 2005)". @JamesHeinrich what do you think?

[JamesHeinrich]

I have added "TRY" for the new Turkish Lira, but the old "TRL" should not be removed.
265b78c

edit: exactly as StudioMaX said while I was making the change :)

[lebedevsergey]

Well, had had the same idea - to keep the old code when adding the new one. But then I thought that there are definitely a lot of outdated currency codes, and they are not present in getID3 source.
Anyway, you've made your decision, thanks for this update

[JamesHeinrich]

If you care to present a list of outdated currency codes that are not present in getID3's list I don't mind including them.