Anselm Lingnau

Eric's cribs are now imported correctly (some were missed because of a change in the source data format, instead being made part of the preceding crib). On top of that we now distinguish between »checked by Eric himself« and »checked by somebody else too«.

This is in the aftermath of the dance-intensity debate as per this thread on the Strathspey list, which introduced »per-turn« dance intensity in addition to Eric's »per-dance« dance intensity.