Update .mailmap file.
Update .mailmap file.

Added a few new users and removed a duplicate entry. We are now up to
115 unique contributors.

Refs #000.

SudiptaBiswas/moose,dschwen/moose,yipenggao/moose,jessecarterMOOSE/moose,milljm/moose,andrsd/moose,bwspenc/moose,YaqiWang/moose,permcody/moose,liuwenf/moose,YaqiWang/moose,idaholab/moose,lindsayad/moose,permcody/moose,laagesen/moose,idaholab/moose,stimpsonsg/moose,yipenggao/moose,SudiptaBiswas/moose,harterj/moose,sapitts/moose,permcody/moose,bwspenc/moose,sapitts/moose,idaholab/moose,sapitts/moose,milljm/moose,dschwen/moose,sapitts/moose,milljm/moose,joshua-cogliati-inl/moose,harterj/moose,friedmud/moose,Chuban/moose,lindsayad/moose,andrsd/moose,idaholab/moose,harterj/moose,andrsd/moose,katyhuff/moose,stimpsonsg/moose,katyhuff/moose,harterj/moose,milljm/moose,laagesen/moose,andrsd/moose,nuclear-wizard/moose,stimpsonsg/moose,liuwenf/moose,nuclear-wizard/moose,liuwenf/moose,friedmud/moose,bwspenc/moose,SudiptaBiswas/moose,joshua-cogliati-inl/moose,dschwen/moose,Chuban/moose,yipenggao/moose,nuclear-wizard/moose,laagesen/moose,jessecarterMOOSE/moose,harterj/moose,backmari/moose,SudiptaBiswas/moose,jessecarterMOOSE/moose,andrsd/moose,SudiptaBiswas/moose,Chuban/moose,liuwenf/moose,dschwen/moose,katyhuff/moose,friedmud/moose,backmari/moose,jessecarterMOOSE/moose,backmari/moose,idaholab/moose,laagesen/moose,milljm/moose,joshua-cogliati-inl/moose,katyhuff/moose,lindsayad/moose,yipenggao/moose,sapitts/moose,stimpsonsg/moose,liuwenf/moose,bwspenc/moose,jessecarterMOOSE/moose,friedmud/moose,dschwen/moose,lindsayad/moose,laagesen/moose,backmari/moose,nuclear-wizard/moose,joshua-cogliati-inl/moose,Chuban/moose,YaqiWang/moose,YaqiWang/moose,lindsayad/moose,permcody/moose,bwspenc/moose,liuwenf/moose