Add Releases tab to the repo page

[hkdobrev]

Closes #8

I've successfully added a releases tab.
However I have some concerns which I hope I'd be able to address with your help.

• Adding just <span class="octicon octicon-tag"> does not render an icon. I needed to add a full SVG markup like the rest of the icons I could find on github.com.
• Appending the Releases tab and activating it instead of Code is rather slow and you could visually see the change after the page loads. Feedback appreciated.
• If you have an idea how to easily count the number of releases (or tags) to put next to the label on the tab, that would be great.

P.S. This also adds a new shortcut g r for navigating to the releases page of a repo 😺

[sindresorhus]

gitHubInjection(window, {wait: 1}, () => {

To make it appear faster.

[sindresorhus]

Nice work!

When I click the tab and then click the back button in the browser, the Releases tab is duplicated. We need to somehow guard it. @stefanbuck Any tips on how to handle this? Something the injection module could handle for us maybe?

[hkdobrev]

@sindresorhus I think I've addressed your comments. I've also added a quick check if the Releases tab is not already present which solves the back button behaviour. It should also work if GitHub decides to add a Releases tab themselves 😄

P.S. Let me know if you want to squash my commits.

[hkdobrev]

I've also fixed the activation of Releases tab when visiting the Tags page, e.g. https://github.com/sindresorhus/refined-github/tags.

[stefanbuck]

GitHub.com use some kind of cache for pages that you visited before. So if you navigate back and forth you just switch between the cache pages. That's the reason why the button was added multiple times, because in the cache version it was already there.

The quick check that @hkdobrev implemented looks simple and solid 👍

[sindresorhus]

@stefanbuck Thanks for chiming in. I'm aware of the caching. I was wondering more in the direction of a general solution than having to check everything you add.

[stefanbuck]

Ahh I see, let me think about it.

[sindresorhus]

@stefanbuck Ok, cool. Let's continue in OctoLinker/injection#2.

[sindresorhus]

Perfect! Thank you @hkdobrev. This is a really nice addition.

Adding you to the repo per the open open source idea because of this awesome contribution.

If you have an idea how to easily count the number of releases (or tags) to put next to the label on the tab, that would be great.

We could scrape it from the repo landing page when the user goes there, persist it in localstorage, and then have it available to any repo page. Not sure whether it's worth the trouble, though.