fix broken doc links
fix for issue #63, incorrect one-to-one relations
prep docs for 0.5.1
release 0.5.1
Adding the docs title
Merge branch 'master' into active-record

* master:
  Adding the docs title
  release 0.5.1
  prep docs for 0.5.1
  fix for issue #63, incorrect one-to-one relations
  fix broken doc links
small doc updates