Implement intra_move and checker methods
Implement intra_move and checker methods

Johnetordoff/waterbutler,rdhyee/waterbutler,cosenal/waterbutler,hmoco/waterbutler,TomBaxter/waterbutler,rafaeldelucena/waterbutler,CenterForOpenScience/waterbutler,icereval/waterbutler,felliott/waterbutler,RCOSDP/waterbutler,Ghalko/waterbutler,kwierman/waterbutler,chrisseto/waterbutler