Remaining RM3 Changes

[seanmacavaney]

Related to #407 and #447

• Move RM* implementations into terrier-core. There's an open PR for this. move RM1/RM3 implementations and tests from terrier-prf package terrier-core#250. We may want to change the class names to avoid conflicts.
  • update move RM1/RM3 implementations and tests from terrier-prf package terrier-core#250 to the rm_tiebreak version
  • If we rename, need to update RM3 pyterrier integration to point to new classes
  • If we do not rename, we need to make a new release of terrier-core
• Remove RM* implementations from terrier-prf?
• Remove AxiomaticQE implementation/tests/etc from pyterrier and move example code to terrier-prf
• Remove pt.terrier.set_prf_version

[seanmacavaney]

I realized that terrier-org/terrier-core#250 tool from terrier-prf's main branch, not the rm_tiebreak branch https://github.com/terrierteam/terrier-prf/tree/rm_tiebreak. This also needs to be fixed.