[fix #265] Dead link to the documentation
[fix #265] Dead link to the documentation

Replace 'http://bluelatex.gnieh.org/developers/' by 'http://www.bluelatex.org/developers/' in the readme file.
gnieh/bluelatex,tdurieux/bluelatex,tdurieux/bluelatex,gnieh/bluelatex,gnieh/bluelatex,gnieh/bluelatex,tdurieux/bluelatex,tdurieux/bluelatex