Add tasks for all the new languages

Task/Range-extraction/LiveCode/range-extraction-1.livecode

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+function rangeExtract nums
+    local prevNum, znums, rangedNums
+    set itemDelimiter to ", "
+    put the first item of nums into prevNum
+    repeat for each item n in nums
+        if n is (prevNum + 1) then
+            put n into prevNum
+            put "#" & n after znums
+        else
+            put n into prevNum
+            put return & n after znums
+        end if
+    end repeat
+    set itemDelimiter to "#"
+    repeat for each line z in znums
+        if z is empty then next repeat
+        switch the number of items of z
+            case 1
+                put z & "," after rangedNums
+                break
+            case 2
+                put item 1 of z & "," & item -1 of z & "," after rangedNums
+                break
+            default
+                put item 1 of z & "-" & item -1 of z & "," after rangedNums
+        end switch
+    end repeat
+    return char 1 to -2 of rangedNums  --strip off trailing comma
+end rangeExtract

Task/Range-extraction/LiveCode/range-extraction-2.livecode

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+command testRangeExtract
+    local numbers
+    put "0, 1, 2, 4, 6, 7, 8, 11, 12, 14," \
+          && "15, 16, 17, 18, 19, 20, 21, 22, 23, 24," \
+          && "25, 27, 28, 29, 30, 31, 32, 33, 35, 36," \
+          && "37, 38, 39" into numbers
+    put rangeExtract(numbers)
+end testRangeExtract

Task/Range-extraction/LiveCode/range-extraction-3.livecode

@@ -0,0 +1 @@
+0-2,4,6-8,11,12,14-25,27-33,35-39