Remove standalone script. Add complexity metric to summary report.
Added reservoir sampling.
Allow upgrades for older bcbio-nextgen versions without matplotlib installed. Ensure matplotlib and statsmodels dependencies are declared and installed via conda
Update ipython-cluster-helper with Rory and Mario's slurm work
Update exome and whole genome examples to use latest version of Genome in a Bottle reference v2.17. Thanks to @mjafin
Save complexity plot as part of the output of the pipeline.
Shuffle the output from samples before iterating over it.

This way the complexity metric is not skewed by stacks of the same
read in a sorted BAM file.
Document cases where VQSR used for variant filtering. Fixes #167
Merge branch 'master' of github.com:chapmanb/bcbio-nextgen