change haversine computation to cheap ruler in distance tables

features/support/data_classes.js

@@ -21,7 +21,8 @@ module.exports = {
                 matchRe = want.match(/^\/(.*)\/$/),
                 // we use this for matching before/after bearing
                 matchBearingListAbs = want.match(/^((\d+)->(\d+))(,(\d+)->(\d+))*\s+\+\-(.+)$/),
-                matchIntersectionListAbs = want.match(/^(((((true|false):\d+)\s{0,1})+,{0,1})+;{0,1})+\s+\+\-(.+)$/);
+                matchIntersectionListAbs = want.match(/^(((((true|false):\d+)\s{0,1})+,{0,1})+;{0,1})+\s+\+\-(.+)$/),
+                matchRangeNumbers = want.match(/\d+\+\-\d+/);
 
             function inRange(margin, got, want) {
                 var fromR = parseFloat(want) - margin,
@@ -105,6 +106,11 @@ module.exports = {
                 return inRange(margin, got, matchAbs[1]);
             } else if (matchRe) {               // regex: /a,b,.*/
                 return got.match(matchRe[1]);
+            } else if (matchRangeNumbers) {
+                let real_want_and_margin = want.split('+-'),
+                                  margin = parseFloat(real_want_and_margin[1].trim()),
+                               real_want = parseFloat(real_want_and_margin[0].trim());
+               return inRange(margin, got, real_want);
             } else {
                 return false;
             }