replace error handlers for stdout and co.

Python3.5 and lower throw an UnicodeEncodeError when trying to print
not-encodable characters when not using 'utf-8' as encoding.
Setting their error handlers to 'replace' should help.

test/test_results.py

@@ -21,6 +21,7 @@ TRAVIS_SKIP = {
 
 # temporary issues, etc.
 BROKEN = {
+    "imgyt",        # "Name or service not known"
     "loveisover",   # "Name or service not known"
     "luscious",     # order changed, "Jump to Page" is gone
     "mangahere",    # invalid SSL cert