Make the error on other task message red

[ammernico]

Will make it easier to spot it in the output.

Partially fixes #57

This is an older commit. CP tested it, was fine

[ammernico]

(because it's red (like in occured))

No, it was an old commit and disregarded all changes made in since the commit was created. Let's see what CP thinks about the coloring

[christophprokop]

output much better readable since 71b1921