adjusted various details:

- changed floppiness implementation
- changed default flopiness
- made heaband rounder
- added hingetest

dogear.scad

@@ -71,13 +71,16 @@ module dogear(flopness){
     }
     else{
         if(flopness == "vvflop"){
-            a2 = 45;
-            a3 = 45;
+            a1 = 40;
+            a2 = 40;
+            a3 = 40;
             dogearAllOptions(a1, a2, a3, a4);
         }
         else{
             if(flopness == "vflop"){
-                a3 = 45;
+                a1 = 35;
+                a2 = 35;
+                a3 = 35;
                 dogearAllOptions(a1, a2, a3, a4);
             }
             else{