On solaris use the tail in /usr/xpg4/bin/tail insteaf of /usr/bin/tail which does not support the -n option
Merge madazone/buildbot:upstream-master (PR #1065)
apply 09749e7 to master
Removed bare excepts
replaced "except as" syntax w/ 2.4 compatible comma syntax
replace assertions, raise ValueError instead
update steps to use requiredArgs
Fix failing test & shell command
check rc in a callback (errback is not called)
send headers and errno for failed fs commands
removed blank line
Merge jpommerening/buildbot:slave-fs-cmds-cleanup (PR #1066)
add a BuildStep.isNewStyle method
relnotes for new-style steps
support calling run on new-style steps
Integration tests for custom buildsteps (backport from nine)

This includes updates to fakes and interface tests for them
fix pep8/pyflakes
fix pylint
more pep8
move tests for buildbot.process.remotecommand to the appropriate module