Work-around for "outer border - second hand line in IE" issue

Hi,

![coolclock-issue-with-seconds-hand](https://f.cloud.github.com/assets/1184853/43525/1d1f04a4-568b-11e2-923d-c02a612a3546.gif)

The issue causing a line or shadow originiating from the 3 o'clock point following the second hand (or minute hand if lacking a second hand) as described on  https://github.com/simonbaird/CoolClock/issues/11 can be fixed (or rather worked around) by removing the outer border completely in IE. Just like the decorations...

Not a real fix but still rather effective :) as tested live in the CoolClock WordPress plugin http://wordpress.org/extend/plugins/coolclock/

Please include for 3+

Thanks!