Add updated sqlfluff graphics and source. (#1315)

* Add updated sqlfluff graphics and source.

* Apply tinypng

* SVG crop

* Add images readme

* Ignore DS_store files

Co-authored-by: Barry <barry@tunetheweb.com>

.gitignore

@@ -2,6 +2,7 @@
 .vscode
 .idea
 /.sqlfluff
+**/.DS_Store
 
 # Ignore Python cache and prebuilt things
 .cache

images/README.md

@@ -0,0 +1,24 @@
+# SQLFluff image assets
+
+The logos, both as png and svg files are available here for use when referencing the project.
+
+Contributions are welcome to these files in addition to contibutions to the codebase
+of the project. This is especially useful if you have graphic design skills, but before
+planning any large scale changes, do raise an issue for discussion on GitHub to ensure
+that your planned changes are likely to be accepted.
+
+With that in mind please follow some of the following guidelines:
+- Be mindful that these files are linked to in several places, including the main
+  `README.md` file which generates the pypi profile for the project. Don't remove or
+  rename files without being mindful of this.
+- If you edit the `svg` files, please re-generate the corresponding `png` files accordingly.
+- Please use https://svgcrop.com/ and https://tinypng.com/ to crop and minimise `svg`
+  and `png` files before committing.
+
+## Licensing
+
+Unless otherwise noted, these works are licensed under the Creative Commons
+Attribution-ShareAlike 4.0 International License. To view a copy of this license,
+visit http://creativecommons.org/licenses/by-sa/4.0/ or send a letter to Creative
+Commons, PO Box 1866, Mountain View, CA 94042, USA.
+