fix ticket #1382716 (problem was actually more subtle than I originally thought) * log errors happening in looping tasks and repo threads * do not swallow RegistryNotFound exceptions which occur during hook execution (only those happening during hook registry selection)

\.svn
^build$
^dist$
\.pyc$
\.pyo$
\.bak$
\.old$
\~$
\#.*?\#$
\.swp$
^doc/book/en/apidoc$