fixed invalid ASCII characters

just removed invalid ASCII characters.

the problem is when imported `@import "bower_components/dragoncss/dragon";` and compiled with `compass compile` ( blinktrade.github.io project ) i get this error.

```
error assets/sass/blinktrade.scss (Line 40 of assets/sass/bower_components/dragoncss/generic/_reset.scss: Invalid US-ASCII character "\xE2"
```