ENH: Added .mailmap file to fix mapping of subjects
ENH: Added .mailmap file to fix mapping of subjects

Several commits were made that associated different users with
for the same person.

dawnsong/ANTs,dawnsong/ANTs,fliem/ANTs,fbudin69500/ANTs,stnava/ANTs,DaisukeMiyamoto/ANTs,dawnsong/ANTs,stnava/ANTs,fbudin69500/ANTs,DaisukeMiyamoto/ANTs,DaisukeMiyamoto/ANTs,DaisukeMiyamoto/ANTs,acaprihan/Lungs,dawnsong/ANTs,DaisukeMiyamoto/ANTs,fliem/ANTs,stnava/ANTs,DaisukeMiyamoto/ANTs,acaprihan/Lungs,fbudin69500/ANTs,dawnsong/ANTs,stnava/ANTs,fbudin69500/ANTs,fbudin69500/ANTs,fbudin69500/ANTs,acaprihan/Lungs,fliem/ANTs,dawnsong/ANTs,fliem/ANTs,acaprihan/Lungs,stnava/ANTs,fbudin69500/ANTs,DaisukeMiyamoto/ANTs,stnava/ANTs,fliem/ANTs,dawnsong/ANTs,fliem/ANTs,acaprihan/Lungs,fliem/ANTs,acaprihan/Lungs,stnava/ANTs