Bump ipython-cluster-helper to latest release with SGE fixes. #215
Updated documentation regarding resources: cores
Add bcftools based merge functionality that avoids issues involved with GATK file locks. Still needs full integration after further testing with isolated parallel merge functionality. #155
Merge branch 'master' of github.com:chapmanb/bcbio-nextgen
Add memoization for Cufflinks.
Fixed bug where very short files were not being extracted properly.
Added running bcbio-nextgen on a subset of test data.

test_run: True at the top of the sample configuration file
will downsample any BAM/fastq files to 10,000 entries before running
the pipeline.