Adds flashcards to Glossary & makes small corrections
Author: darigovresearch
Pull request: yes

# What does this PR do?

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Flashcards have been made using the glossary as a starting point and are now linked at the start of the glossary. Other small corrections & standardisations have also been made for consistency.

This pull requests follows from the discussion in issue #8932

## Before submitting
- [x] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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## Who can review?

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@sgugger 

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Comments:
Thanks very much for the feedback, the relevant updates have been made as requested in a1295b7!

@sgugger Is there anything else that is required for this pull request to be merged?

@sgugger is there anything else that needs to be done on our side for this pull request to be merged?

Hi @darigovresearch, sorry I missed your previous ping. We have just added a [community page](https://huggingface.co/transformers/master/community.html) in the documentation and we would actually prefer to put the links to your flashcards there if that's okay.

Sorry again for the delay!

Hi @sgugger, no worries the updates have been made to the community.md file, the glossary.rst file still contains the corrections but has removed reference to the flashcards.

Is there anything else you need for this to be merged?

Nope, that's perfect! Thanks a lot for your patience.

@sgugger no worries & thanks for merging it!

When checking the page it appears that the rendering works in the .md file but not the final page - https://huggingface.co/transformers/master/community.html

Not sure what it could be, any thoughts?

Potentially add an extra blank line after the heading?

![image](https://user-images.githubusercontent.com/30328618/105222234-228c5480-5b52-11eb-9efe-2f303761854f.png)


Yes I just tested locally and it was the new line missing. I added it in [this commit](https://github.com/huggingface/transformers/commit/7acfa95afb8194f8f9c1f4d2c6028224dbed35a2) (directly on master).

Great, thanks for the heads up and for the help!