support Raspberry Pi Raspbian configure.sh
checkstyle.sh: fix for environments where pylint != pylint2

Signed-off-by: Thomas Stilwell <stilwellt@openlabs.co>
Merge pull request #632 from benemorius/pylintfix

checkstyle.sh: fix for environments where pylint != pylint2
Revert PR #621
Merge pull request #633 from dionyziz/revert_621

Revert PR #621
remove -j option
Merge pull request #613 from y12studio/pi-raspbian-conf

support Raspberry Pi Raspbian configure.sh
Raise ValueError if contact not in bucket
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Revert "Bitmessage cannot reference self.guid because it isn't set yet"

This reverts commit f3dddf48abb1a815c34264e94e91d22d32ca2118.
Refactoring based on feedback