Idea: Switch to css calc

Hello,

i really love the simplicity of your plugin and i just thought you maybe like to see my approche for a really simple css (sass) width calculation

@media (min-width: 990px) { // should be customizable
  .content-column {
    float: left;
    padding-right: 20px; // should be customizable

    &.last-column {
      padding-right: 0;
    }
  }

  .one_half {
    width: calc(100% / 2);
  }

  .one_third {
    width: calc(100% / 3);
  }

  .one_fourth {
    width: calc(100% / 4);
  }

  .three_fourth {
    width: calc(100% / 4 * 3);
  }

  .one_fifth {
    width: calc(100% / 5);
  }

  .two_fifth {
    width: calc(100% / 5 * 2);
  }

  .three_fifth {
    width: calc(100% / 5 * 3);
  }

  .four_fifth {
    width: calc(100% / 5 * 4);
  }

  .one_sixth {
    width: calc(100% / 6);
  }
}