Added a 'glob' command to the slave.

Can be used to retrieve a list of files from the slave that match
a given pattern. (This is somewhat more portable than using shell
expansion.)
Custom steps can use this command to add filenames to a property
of the build where they may be later picked up by an uploading step.

RemoteCommand('glob', dict(path='[Bb]uild[Bb]ot-*', workdir='wkdir'))
pep8 (so close)
Fix step None bug

Step text might be None sometimes when the step is failed.
It broke the build detail page. Check the screenshot attached.
https://trello-attachments.s3.amazonaws.com/520e20a062ccc3b70d0029d0/52a1ca4124eaaa752a005976/21abdc7f2b56df6af1244653e3bbd0e1/build_detail_bug.png
Merge smokingkapor/buildbot:master (PR #1061)
Ignore decoding errors in atom/rss feeds; fixes #951
remove use of MutableMapping, not in Python 2.5
Do not catch GeneratorExit exception

On buildbot 0.8.8 in rare conditions, we hit:

File "/data/buildbot/twisted/internet/threads.py", line 49, in deferToThreadPool
      threadpool.callInThreadWithCallback(onResult, f, *args, **kwargs)
    File "/data/buildbot/twisted/python/threadpool.py", line 148, in callInThreadWithCallb
ack
      self.q.put(o)
    File "//usr/lib/python2.7/Queue.py", line 138, in put
      self.not_empty.notify()
    File "//usr/lib/python2.7/threading.py", line 392, in notify
      for waiter in waiters:
  --- <exception caught here> ---
    File "/data/buildbot/buildbot/process/buildstep.py", line 605, in _startStep_3
      result = yield defer.maybeDeferred(self.start)
  exceptions.GeneratorExit:

this applies the fix from http://trac.buildbot.net/ticket/2395#comment:10 to master/buildbot/process/buildstep.py
Merge chantra/buildbot:fb-master (PR #1063)
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)