[bugfix] sistemata la query su dominio come ricerca.
Funzione di utilità start_logger().
[minor] sistemati i commenti.
[searcher] modularizzato il main e iniziato il logger.
[saercher][minor] PEP8 su long lines.

http://www.python.org/dev/peps/pep-0008/#maximum-line-length

...
The preferred way of wrapping long lines is by using Python's implied
line continuation inside parentheses, brackets and braces. Long lines
can be broken over multiple lines by wrapping expressions in
parentheses. These should be used in preference to using a backslash for
line continuation.
..