Need to add decontaminator and deduplicator

[Jason Vander Heiden]

We need a scriptable version of the UID decontamination and duplicate removal script in changeo. Prototype R version at:

javh/analysis/oconnor_mg_memory/ filter_and_collapse_2015-07-03.R

Can probably be one tool if done right.

[Jason Vander Heiden]

From @Moriah :
"It could be great if an option/mode could be added to CollapseSeq to make it work on MakeDb files since re-collapsing is often needed after creating the IMGT gapped sequences or VDJ sequences. Thanks!"