thoughtbot/bourbon — pull request #121 by linrock (2012-09-14 10:22:27+00:00)
Title: Avoid deprecation warnings in the button add-on (fixes #119)

Removed use of the deprecated border-radius mixin in addons/_buttons.scss. Otherwise, a warning shows up each time a button mixin is used.

Looks like it's safe to stop using the -webkit- vendor prefixes. Browsers that still use it as of August 2012:
```
iOS Safari 3.2 0.16%
Android Browser 2.1 0.12%
Safari 4.0 0.11%
```

Source: http://caniuse.com/#search=border-radius
Source: http://caniuse.com/usage_table.php