Change the time format for seconds from ceil to floor

[galexynye]

Short description of changes:

In the Angular Player example, when the time was suppose to hit a new minute and display 01:00 or 02:00 it would display 00:00 for one second before displaying 01:01 or 02:01. By changing the format function it now displays each minute properly and the length is the actual file length.

[coveralls]

Coverage increased (+0.1%) to 69.931% when pulling d264d1d on galexynye:AudioTimingFix into 926a995 on katspaugh:master.

[thijstriemstra]

thanks!

[galexynye]

:)