Fixing WWW::Questhub::Quest added get_author()

And incorrect methods were removed. At first I was mistaken, I thought that
there is no field author and that info should be taken from the array 'team'.
New method print_info() in WWW::Questhub::Quest
Refactoring. Changing the order of the methods.
Refactoring. Several methods are extracted to Util

Created new module WWW::Questhub::Util