Eliminate font-family and font-weight from font-icon-glyph
These CSS properties should not duplicate by default, I think. Simply because most users will put it in a general selector, e.g.:

```
[class^="icon-"], [class*=" icon-"] {
  /* use !important to prevent issues with browser extensions that change fonts */
  font-family: iconfont !important;
  speak: none;
  font-style: normal;
  font-weight: normal;
  font-variant: normal;
  text-transform: none;
  line-height: 1;

  /* Better Font Rendering =========== */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
```
In this case it's redundant CSS weight, which looks more like a problem. At least, this might become an option.