Fixes for boostrap v3.0.3

Bootstrap v3.0.3 has been released.  It breaks the column layouts in `dateparts.pt` and `datetimeinput.pt`.
(The culprit is [this commit](https://github.com/twbs/bootstrap/commit/853b69f2dfe66a839efa6216e9e7c1a530f92f62).)  This fixes that.

At this point I’ll admit that I do not fully understand the motivation for the upstream change, so perhaps this is not the best solution or maybe this is really an upstream bug.

![deform-dateparts-bs-v3 0 3](https://f.cloud.github.com/assets/495018/1698900/09bfe614-5f70-11e3-8845-f922657d50f3.png)