enable Unicode log output to console

When logging a character such as "™" to the console, the following error is produced:

````
[28211] error @0.011815> [hit #1]request to GET /hello crashed: Warning caught during route execution: Wide character in print at .../perl5/lib/perl5/Dancer/Logger/Console.
pm line 9
````

Example:

````perl
get '/foo' => sub {
    debug "testing™";
    return bar;
};
````