Match current standards for awesome-lists as defined by @sindresorhus

@sindresorhus has changed the standards for an awesome-list, and this list needs to be changed to match. See https://github.com/sindresorhus/awesome/issues/926 for more.

Criteria

[x] Has been around for at least 30 days.
That means 30 days from either the first real commit or when it was open-sourced. Whatever is most recent.
[ ] It's the result of hard work and the best I could possibly produce.
[x] Non-generated Markdown file in a GitHub repo.
[x] The repo should have the following GitHub topics set: awesome-list, awesome, list. I encourage you to add more relevant topics.
[x] Not a duplicate.
[x] Includes a succinct description of the project/theme at the top of the readme. (Example)
[x] Only has awesome items. Awesome lists are curations of the best, not everything.
[x] Includes a project logo/illustration whenever possible.
- [x] Placed at the top-right of the readme. (Example)
- [x] The image should link to the project website or any relevant website.
- [x] The image should be high-DPI. Set it to maximum half the width of the original image.
[ ] Entries have a description, unless the title is descriptive enough by itself. It rarely is though.
[x] Has the Awesome badge on the right side of the list heading,
[x] Has a Table of Contents section.
- [x] Should be named Contents, not Table of Contents.
- [x] Should be the first section in the list.
[x] Has an appropriate license.
- [x] That means something like CC0, not a code licence like MIT, BSD, Apache, etc.
- [x] If you use a license badge, it should be SVG, not PNG.
[x] Has contribution guidelines.
- [x] The file should be named contributing.md. Casing is up to you.
[ ] Has consistent formatting and proper spelling/grammar.
- [ ] Each link description starts with an uppercase character and ends with a period.
  Example: - [AVA](…) - JavaScript test runner.
- [ ] Drop all the A / An prefixes in the descriptions.
- [ ] Consistent naming. For example, Node.js, not NodeJS or node.js.
[x] Doesn't include a Travis badge.
You can still use Travis for list linting, but the badge has no value in the readme.

RichardLitt / awesome-conferences

Match current standards for awesome-lists as defined by @sindresorhus #105

Criteria