When running article.parse() I am running into memory issues with a large number of articles being processed.

Each time the function is called it eats up about 0.5MB of memory that is not released when the parsing is done.

I took a look at the parse() function in article.py and it looks like the release_resources() function still has a TODO to be properly implemented:

https://github.com/codelucas/newspaper/blob/master/newspaper/article.py#L355

I'm curious if you can give more detail about a proper implementation of this function so that parse() will release the memory once it is done with it.