Add FiNER dataset
> That's really cool thank you !
> 
> Could you also add a dataset card ?
> You can find a template here : https://github.com/huggingface/datasets/blob/master/templates/README.md

The full information for adding a dataset card can be found here :) 
https://github.com/huggingface/datasets/blob/master/ADD_NEW_DATASET.md#manually-tag-the-dataset-and-write-the-dataset-card
 Thanks your suggestions! I've fixed them, and currently working on the dataset card! @yjernite and @lhoestq I will add the dataset card a bit later in a separate PR if that's ok for you! Yes I want to re-emphasize if it was not clear that dataset cards are optional for the sprint. 

Only the tags are required for merging a datasets.

Please try to enforce this rule as well @lhoestq and @yjernite  Yes @stefan-it if you could just add the tags (the yaml part at the top of the dataset card) that'd be perfect :)  Oh, sorry, will add them now!
 Initial README file is now added :)  the `RemoteDatasetTest ` errors in the CI are fixed on master so it's fine merging since the CI is fixed on master
Hi,

this PR adds "A Finnish News Corpus for Named Entity Recognition" as new `finer` dataset.

The dataset is described in [this paper](https://arxiv.org/abs/1908.04212). The data is publicly available in [this GitHub](https://github.com/mpsilfve/finer-data).

Notice: they provide two testsets. The additional test dataset taken from Wikipedia is named as "test_wikipedia" split.