Twitter Bootstrap Center any column

center-column.css

.center-column {
	float: none !important;
	margin: 0 auto;
}
.no-padding-left {
  padding-left: 0;
}
.no-padding {
  padding: 0;
}
.form-group {
  overflow: hidden;
}

test.html

<div class="container">
  <div class="row">
    <div class="col-md-4 center-column">

      <!-- Example Login form -->
      <form name="" novalidate>
        <div class="form-group">
          <label for="username" class="control-label col-md-4 no-padding-left">Username</label>
          <div class="col-md-8 no-padding">
            <input id="username" name="username" type="text" placeholder="Username" />
          </div>
        </div>

        <div class="form-group">
          <label for="password" class="control-label col-md-4 no-padding-left">Password</label>
          <div class="col-md-8 no-padding">
            <input id="password" name="password" type="password" placeholder="Password" />
          </div>
        </div>

        <button class="btn btn-default">Login</button>
      </form>

    </div>
  </div>
</div>