parent (&) selector broken

[glennfu]

Using this:

    a {
      color: #038EA1;
      text-decoration: none;
      &:hover { text-decoration: underline; }
    }

Gives the error:

    expected one of @import * - @ :: : . # [ @media @font-face /* // } got & after:

Reading this post: https://less.tenderapp.com/discussions/questions/39-does-less-have-a-parent-selector-ala-sasss-operator

suggests that it works properly in the JS version, but has never worked in the ruby gem.

[heygambo]

It took me 1h to figure out that more doesn't support the & selector.
Would be nice to have a notice in README.markdown.