Do not use the -U flag in PyPkgInstaller by default
Merge pull request #228 from ogrisel/pypkginstaller-no-pip-dash-u-bydefault

Do not use the -U flag in PyPkgInstaller by default
bump paramiko to latest 1.10.0 version
Merge branch 'develop' of git://github.com/jtriley/StarCluster into vanilla_improvements
threadpool: clear the exceptions queue in wait()

Updated ThreadPool.wait() to drain all exceptions out of the exception
queue everytime it raises a ThreadPoolException. This keeps the
exception queue from potentially growing endlessly and also prevents
raising old exceptions.
Merge branch 'develop' of git://github.com/jtriley/StarCluster into vanilla_improvements

Conflicts:
	starcluster/threadpool.py
Merge branch 'vanilla_improvements' of github.com:datacratic/StarCluster into vanilla_improvements