Missing import fixed.

Thanks to @medboth. Closes #522.
Label structural variant output files by batches, allowing multiple batches to be run on the same input BAM files for partially overlapping analyses. Fixes #513
Use mm10 in the documentation instead of GRCm38.
Merge branch 'master' of github.com:chapmanb/bcbio-nextgen
Update paired variant calling information
Vardict added to the list of somatic ..

variant callers
Merge pull request #524 from mjafin/patch-1

Update paired variant calling information
Merge pull request #525 from mjafin/patch-2

Vardict added to the list of somatic ..
Remove some cruft from the cufflinks test.
Improved structural variant validation: split validated results from event size to identify strengths of individual callers