SEQuipt: bcbio.nextgen integration

Settings form
-The settings form has been updated to incorporate the bcbio.nextgen
settings to run server side.

Config form
-A new configuration form that gives a tree view of the users selections
from the settings form.

Server-side
-The bcbio.nextgen pipeline is fairly easy to run as long as SEQuipt
creates the appropriate .yaml file using the information from the
settings form. Some other integrations SEQuipt will need to incorporate
into the future is RNA-fusion, CNV, indel, and translocation analysis in
to bcbio.nextgen. Currently, bcbio only performs snv and RNA-Seq