* Typo fix for AllenAI url
Changed incorrect home page url for AllenAI from appenai.org to allenai.org
* Sign contributor agreement
* Change date format
* Request to add Holmes to spaCy Universe
Dear spaCy team, I would be grateful if you would consider my Python library Holmes for inclusion in the spaCy Universe. Holmes transforms the syntactic structures delivered by spaCy into semantic structures that, together with various other techniques including ontological matching and word embeddings, serve as the basis for information extraction. Holmes supports several use cases including chatbot, structured search, topic matching and supervised document classification. I had the basic idea for Holmes around 15 years ago and now spaCy has made it possible to build an implementation that is stable and fast enough to actually be of use - thank you! At present Holmes supports English and German (I am based in Munich) but could easily be extended to support any other language with a spaCy model.
* Added
As discussed with Ines in https://github.com/explosion/spaCy/issues/3568 , adding a new project proposal for the community in SpaCy Universe website
GracyQL a tiny graphql wrapper aroung spacy using graphene and starlette.
## Description
Change only in universe.json file to add a new project
### Types of change
New project reference in Universe
## Checklist
- [x ] I have submitted the spaCy Contributor Agreement.
- [x ] I ran the tests, and all new and existing tests passed.
- [ x] My changes don't require a change to the documentation, or if they do, I've added all required information.
<!--- Provide a general summary of your changes in the title. -->
## Description
The new website is implemented using [Gatsby](https://www.gatsbyjs.org) with [Remark](https://github.com/remarkjs/remark) and [MDX](https://mdxjs.com/). This allows authoring content in **straightforward Markdown** without the usual limitations. Standard elements can be overwritten with powerful [React](http://reactjs.org/) components and wherever Markdown syntax isn't enough, JSX components can be used. Hopefully, this update will also make it much easier to contribute to the docs. Once this PR is merged, I'll implement auto-deployment via [Netlify](https://netlify.com) on a specific branch (to avoid building the website on every PR). There's a bunch of other cool stuff that the new setup will allow us to do – including writing front-end tests, service workers, offline support, implementing a search and so on.
This PR also includes various new docs pages and content.
Resolves#3270. Resolves#3222. Resolves#2947. Resolves#2837.
### Types of change
enhancement
## Checklist
<!--- Before you submit the PR, go over this checklist and make sure you can
tick off all the boxes. [] -> [x] -->
- [x] I have submitted the spaCy Contributor Agreement.
- [x] I ran the tests, and all new and existing tests passed.
- [x] My changes don't require a change to the documentation, or if they do, I've added all required information.
