Integer overflow in usage request

[lubo-dev]

If an account sets no character translation limit the limit is 1 000 000 000 000.
In that case requesting the usage will return a negative number for the character limit.

Minimal example:

Translator translator = new Translator(authKey)
Usage.Detail characterUsage = translator.getUsage().getCharacter();
characterUsage.getLimit() // returns -727379968

The cause of the error lies in UsageDeserializer::createDetail line 28 and 29.
There the limit and count are parsed as Integer, even though they are declared as long in Usage.Detail.
Given that the request can return a number larger than Integer::MAX_VALUE they should not only be declared as long but also parsed as such.

[lubo-dev]

I added a pull request with a fix: #45

[lubo-dev]

The fix was released with version 1.5.1