fix(gh-pages/demos): #990 - Workaround iOS7

**NOTE!**

Will not work until latest Fine Uploader release (3.9) is included since 3.8.2
does not have a `qq.ios7()` function. I assume this will be done on release day
(tomorrow). I pushed these commits to save time on updating the site on release
day.

----

All demo .js files have the added option of:

```
multiple: !qq.ios7()
```

fixes #990

[ci skip]
fix(demo/basic.js): Load correct loading.gif
chore: Update source files
chore: Update download links for release
chore: Update source for release
chore: Update features, browser, source for release