Provide lazy/soft imports for secondary non-core dependencies used in processing to allow use of bcbio-nextgen as a library. conda build script for bcbio-nextgen
add min_read_length to ALGORITHM_KEYS
Merge pull request #267 from porterjamesj/patch-5

add min_read_length to ALGORITHM_KEYS
Removed B run trimming.
Remove B run  trimming.
Finalize removal of old brun trimming: removes supplemental code that is no longer used. Plug min_read_length into read_through_trimming. Add documentation. #267