add locale-specific front page introductory sentence (see https://github.com/sebbacon/alaveteli/issues/131)
add locale-specific front page introductory sentence (see https://github.com/sebbacon/alaveteli/issues/131)

mysociety/whatdotheyknow-theme,mysociety/whatdotheyknow-theme,schlos/whatdotheyknow-theme,schlos/whatdotheyknow-theme,mysociety/whatdotheyknow-theme