Update benchmark results.

With some undesirable backtracking eliminated in attoparsec 0.9.0.0, we
see a nice little bump in parsing performance: between 5% and 12%.

This has also had the nice effect of reducing memory use by about 15%.

aeson.cabal

@@ -20,41 +20,41 @@ description:
     Parsing performance on a late 2010 MacBook Pro (2.66GHz Core i7),
     for mostly-English tweets from Twitter's JSON search API:
     .
-    * 0.8 KB, 32-bit GHC 6.12.3: 29945 msg\/sec (24.4 MB\/sec)
+    * 0.8 KB, 32-bit GHC 6.12.3: 30538 msg\/sec (24.9 MB\/sec)
     .
-    * 0.8 KB, 64-bit GHC 7.0.3: 29280 msg\/sec (23.8 MB\/sec)
+    * 0.8 KB, 64-bit GHC 7.0.3: 31204 msg\/sec (25.4 MB\/sec)
     .
-    * 6.4 KB, 32-bit GHC 6.12.3: 6684 msg\/sec (42.0 MB\/sec)
+    * 6.4 KB, 32-bit GHC 6.12.3: 6731 msg\/sec (42.3 MB\/sec)
     .
-    * 6.4 KB, 64-bit GHC 7.0.3: 5893 msg\/sec (37.1 MB\/sec)
+    * 6.4 KB, 64-bit GHC 7.0.3: 6627 msg\/sec (41.7 MB\/sec)
     .
-    * 11.8 KB, 32-bit GHC 6.12.3: 3610 msg\/sec (41.5 MB\/sec)
+    * 11.8 KB, 32-bit GHC 6.12.3: 3751 msg\/sec (43.2 MB\/sec)
     .
-    * 11.8 KB, 64-bit GHC 7.0.3: 3059 msg\/sec (35.2 MB\/sec)
+    * 11.8 KB, 64-bit GHC 7.0.3: 3381 msg\/sec (38.9 MB\/sec)
     .
     * 31.2 KB, 32-bit GHC 6.12.3: 1306 msg\/sec (39.8 MB\/sec)
     .
-    * 31.2 KB, 64-bit GHC 7.0.3: 1050 msg\/sec (32.0 MB\/sec)
+    * 31.2 KB, 64-bit GHC 7.0.3: 1132 msg\/sec (34.5 MB\/sec)
     .
-    * 61.5 KB, 32-bit GHC 6.12.3: 594 msg\/sec (35.7 MB\/sec)
+    * 61.5 KB, 32-bit GHC 6.12.3: 616 msg\/sec (37.0 MB\/sec)
     .
-    * 61.5 KB, 64-bit GHC 7.0.3: 505 msg\/sec (30.3 MB\/sec)
+    * 61.5 KB, 64-bit GHC 7.0.3: 534 msg\/sec (32.1 MB\/sec)
     .
     Handling heavily-escaped text is a little more work.  Here is
     parsing performance with Japanese tweets, where much of the text
     is entirely Unicode-escaped.
     .
-    * 14.6 KB, 32-bit GHC 6.12.3: 2257 msg\/sec (32.2 MB\/sec)
+    * 14.6 KB, 32-bit GHC 6.12.3: 2315 msg\/sec (33.1 MB\/sec)
     .
-    * 14.6 KB, 64-bit GHC 7.0.3: 1931 msg\/sec (27.6 MB\/sec)
+    * 14.6 KB, 64-bit GHC 7.0.3: 1986 msg\/sec (28.4 MB\/sec)
     .
-    * 44.1 KB, 32-bit GHC 6.12.3: 697 msg\/sec (30.0 MB\/sec)
+    * 44.1 KB, 32-bit GHC 6.12.3: 712 msg\/sec (30.7 MB\/sec)
     .
-    * 44.1 KB, 64-bit GHC 7.0.3: 611 msg\/sec (26.3 MB\/sec)
+    * 44.1 KB, 64-bit GHC 7.0.3: 634 msg\/sec (27.3 MB\/sec)
     .
-    * 82.9 KB, 32-bit GHC 6.12.3: 368 msg\/sec (29.8 MB\/sec)
+    * 82.9 KB, 32-bit GHC 6.12.3: 377 msg\/sec (30.5 MB\/sec)
     .
-    * 82.9 KB, 64-bit GHC 7.0.3: 322 msg\/sec (26.0 MB\/sec)
+    * 82.9 KB, 64-bit GHC 7.0.3: 332 msg\/sec (26.9 MB\/sec)
     .
     Encoding performance on the same machine and data:
     .