Change source of subscriber pack json

[Timardo]

Since default subscriber.json url doesn't for some reason work for everyone, I added this little upgrade which will optionally use another source with the same database of emoticons which is even smaller than the subscriber one because it doesn't contain badges.

Should be ported to newer versions or even replace the old subscriber source, but it's not my decision.

[BlayTheNinth]

Is there a reason not to use this smaller source? If not, this should probably just become the new default (though it should still support EmoticonConfig.twitchSubscriberRegex).

[Timardo]

I don't know any reason why not, and yes, just after commit I noticed that I forgot on the regex thing.