Text is showing instead of icon on some devices
Hi,
I have problem with icons in F7. When I test icons in my browser, emulator, android device(4.4.4 Samsung Galaxy Ace 4) everything works fine, but on my friends tablet icons dont show up, same thing happends in phonegap developer app. I did everything that is specified in README.md file.

# **Code**
```
<div class="right">
            <a href="#" id="change-view" class="link icon-only" style="margin: 0">
                <i class="f7-icons" style="font-size: 20px;width: 20px;color: #fff;margin: 0">photos</i>
              </a>
              <a href="#" id="open-close-search" class="link icon-only search-icon" style="margin: 0">
                <i class="f7-icons" style="font-size: 20px;width: 20px;color: #fff;margin: 0">search</i>
              </a>
</div>
```
# **Images**

**My friends tablet**
![screenshot_2017-08-16-10-46-04](https://user-images.githubusercontent.com/19696561/29357238-1d0695f0-8277-11e7-9301-a6e096915124.jpg)

**My phone**
![slika2](https://user-images.githubusercontent.com/19696561/29357309-58a26f58-8277-11e7-9ff7-7b7a58962e5c.PNG)

