Problem: we are not testing on darwin
Problem: we are not testing on darwin

With the buildRacket improvement and the merged catalog, we are now
building on racket-minimal. This means darwin works!

Solution: Add osx back to the travis matrix.

This reverts commit df04049a4d7c251c065f1325a6bf2dce8d5efcc0.
This reverts #124 .

fractalide/fractalide,sjmackenzie/fractalide,dmichiels/fractalide,sjmackenzie/fractalide,dmichiels/fractalide,fractalide/fractalide,fractalide/fractalide,sjmackenzie/fractalide,dmichiels/fractalide