GUI Clients: Order by popularity

[smith-kyle]

This is a first step towards addressing #804

Here's the popularity order as determined by Google Trends 12 month view.

1. SourceTree
2. GitHub Desktop
3. TortoiseGit
4. GitKraken
5. GitUp
6. SmartGit
7. Git Extensions
8. Tower
9. gitg
10. GitX-dev
11. Aurees
12. git-cola
13. Gitbox
14. Cycligent Git Tool
15. GitEye
16. Fork
17. GitAhead
18. giggle

It's difficult to rank Fork with Google Trends. Even using the term "git fork" wouldn't be accurate since most results relate to the GitHub fork feature. I used "git-fork" instead.

This also changes the CSS of the list so that the links are displayed in the format:

1 2    rather than    1 3
3 4                   2 4

Reference:

• 1-5: https://trends.google.com/trends/explore?date=today%2012-m&q=sourcetree,github%20desktop,tortoisegit,gitkraken,gitup
• 6-10: https://trends.google.com/trends/explore?date=today%2012-m&q=gitg,git%20extensions,git%20tower,smartgit,gitx
• 11-15: https://trends.google.com/trends/explore?date=today%2012-m&q=git%20cola,gitbox,giteye,aurees,cycligent
• 16-18: https://trends.google.com/trends/explore?date=today%2012-m&q=git-fork,gitahead,git%20giggle
• 5 & 6: https://trends.google.com/trends/explore?date=today%2012-m&q=gitup,smartgit
• 10 & 11: https://trends.google.com/trends/explore?date=today%2012-m&q=gitx,aurees
• 15 & 16: https://trends.google.com/trends/explore?date=today%2012-m&q=git-fork,giteye

[peff]

This looks good to me. Thanks for working on it.

I think ranking by Google Trends is a pretty reasonable metric, absent any other data (though if somebody with a vested interest wants to argue against it, I'm happy to listen). We'll probably need to revisit this periodically to get updated trends numbers. It would be nice if that could be done automatically, but probably not worth the boilerplate and hassle it would involve. I'd expect this needs to be re-done no more than once a year.

The CSS changes look like an improvement. I don't know if there are any gotchas with forcing a 2-column layout with these 49% divs or not, but it seems to work fine for me with a couple browsers at a couple different sizes.

We'll need to prebuild the assets before I can push this to heroku, I think. I'll take care of that.