Multiple segment assignments in IgBlast

[Steven Kleinstein]

Check if we are capturing multiple V(D)J assignments in the IgBlast parser. If not, we should be (capturing ties at a minimum) so that we can then choose the appropriate one with TIgGER.

[Jason Vander Heiden]

Yes, we pull the segment calls from # V-(D)-J rearrangement summary which lists all equally scoring top hits as a comma delimited list.