Remove dependency on fontawesome

[jech]

Testing on a fairly slow link (cable Internet), I've found that Galene's load time is 2s, which is way too long for my taste.

Most of the delay is due to the loading of fontawesome, which consists of 124kB of font data and 64kB of CSS. It would be good to either avoid depending on Fontawesome altogether, or to subset the font.

[jjsarton]

The load time depend from download, upload rate and the ping time your load time from 2s suggest that the download ratw will probably be around 5 to 6 Mbits per second. With a connection 2.7/.26 Mbps, 78 ms Ping I get approximately 4.4s.
We can offer a subset of font-awesome or have svg images wich can be inline within the html file. This may offer a little bit less load time.