Provide much more information in the Readme

README.md

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 # d4lf-editor
- A GUI editor for filters for D4LF - especially good at touching up the filters generated by importing from Maxroll
+ A GUI editor for filters for [D4LF](https://github.com/aeon0/d4lf) - especially good
+ at touching up the filters generated by importing from Maxroll.
+
+This GUI editor doesn't give you complete control tto be abe to build out fully
+featured D4LF filters, but it does provide more than enough to maintain a full
+set of filters for a build, letting you evolve it as you get gear.
+
+### Features
+
+<img src="img/unique_example.jpg" width="49%" />
+<img src="img/non-unique_example.jpg" width="49%" />
+
+- Support for Unique or Legendary items
+- Unique Aspect filtering
+- Affix listing
+  - Will build separate affix lists when you mark individual affix as required or 
+    must-be-greater
+  - Minimum Affix count (of affixes not marked individually required or 
+    must-be-greater)
+  - Minimum Greater Affix count (of affixes not marked individually required or
+    must-be-greater)
+- Unique Aspect and Affix Less or Greater value filtering
+- One Filter for every gear slot, any number of extra unique filters
+- Full support for Firefox and Chrome
+  - though Chrome can save over your filter file, whereas Firefox will download a 
+    new file every time as it [lacks support](https://caniuse.com/?search=showSaveFilePicker)
+    for any way to save over a file unfortunately
+
+### Usage
+
+An instance runs at [d4lf-editor.zbee.codes](https://d4lf-editor.zbee.codes/), but 
+you can also self-host it.
+
+There is a guide available at [`guide.html`](https://d4lf-editor.zbee.codes/guide.html)
+that goes over exactly how to use the editor.
+
+#### Self-Hosted
+
+1. Download the latest release from the [tags page](https://github.com/zbee/d4lf-editor/tags)
+2. Put the folder up on your server, or even upload the whole folder to Cloudflare 
+   Pages, which will just work
+3. Open the URL to the `index.html` file in your browser
+
+### Updating
+
+This sees a lot of use in my friend group, so as long as any of us are playing it 
+will be up to date with the latest D4LF features.
+
+For small version changes, I just update the variable to the latest version, and 
+make sure that `json/` files are updated.
+
+For larger changes (which typically mirror larger changes in Diablo, so I 
+typically have a head start), the filters themselves and the code behind them will 
+need updated as well, so that can take longer.
+
+## License
+
+Licensed under the GPL-3.0 License. See [LICENSE](LICENSE) for more information.
+
+Uses:
+- [js-yaml](https://github.com/nodeca/js-yaml)
+- [jquery](https://jquery.com/)
+- [FileSaver.js](https://github.com/eligrey/FileSaver.js)