Ipython-cluster-helper

- Add support for UGE (an open-source fork of SGE) Thanks to Andrew Oler.

- Adjust memory resource fixes for LSF to avoid underscheduling memory on other clusters
- Change timeouts to provide faster startup for IPython clusters (thanks to Maciej Wójcikowski)
- Don't send SIGKILL to SLURM job arrays since it often doesn't kill all of the jobs. (mwojcikowski)

- Fix memory resources for LSF when jobs requests 1 core and mincore has a value > 1.

- Fix tarball issue, ensuring requirements.txt included.

- Support for IPython 4.0 (brainstorm, roryk, chapmanb, lpantano)

- Support `numengines` for Torque and PBSPro for correct parallelization with bcbio-nextgen.
- Ensure we only install IPython < 4.0 since 4.0 development versions split out IPython parallel
into a new namespace. Will support this when it is officially released.
- Added wait_for_all_engines support to return the view only after all engines are up (matthias-k)
- IPython.parallel is moving towards separate packages (brainstorm).