yearly proportion plot added to topic_report
yearly proportion plot added to topic_report

topic_report now wants tm_wide as well as tm_long.

also, bugfix in tm_yearly_totals: drop unused factor levels on date.

agoldst/dfr-analysis,agoldst/dfr-analysis,agoldst/dfrtopics,agoldst/dfrtopics,agoldst/dfrtopics,agoldst/dfr-analysis,joncgoodwin/dfrtopics,agoldst/dfr-analysis,joncgoodwin/dfrtopics,agoldst/dfrtopics,joncgoodwin/dfrtopics,agoldst/dfrtopics