Totally disable word_diff_spec
Add Difference module

Major re-namespacing. Now work to get the specs green again.
Require report files in Report
Get rid of NoUniqueReportable

We can provide that feature for everything
Fix Sentence to work with new naming of Difference
Add Reportable#add_wrong
Make Datapoint classes use regular Reportable
Attempt at DiffReporter#report_diff
Fix attribute assignments in Word
Work on reporting of differences of Attributes