Added documentation to group dsl

Author: Jeremy Carroll

samples/group/README.md

@@ -1,8 +1,9 @@
-This functionality requires [Graphite 1.0] to be
+This functionality requires Graphite 1.0 to be
 compiled. The current stable release does not have the
 function groupByNode. This feature will be available
 when Graphite 1.0 is released.
 
+Graphite 1.0 Functions
 [http://graphite.readthedocs.org/en/1.0/functions.html]
 
 The callback aggregator is a function will be applied
@@ -12,4 +13,3 @@ function "sumSeries" will be applied to each result
 adding the total read iops of all like named disks
 and graphing the result.
 
-[1]: http://graphite.readthedocs.org/en/1.0/functions.html        "Graphite 1.0"