HyREPL.middleware.eval: Fix return value / stdout ordering
HyREPL.middleware.eval: Fix return value / stdout ordering

When returning a return value and the output of stdout, return stdout
first. This fixes #18.

Signed-off-by: Gergely Nagy <6780fac3b38619ac20422286e4110a70dbba2203@madhouse-project.org>

Foxboron/HyREPL,Foxboron/HyREPL