Whitespace fixes (s/tab/space/g) and added two new configuration settings

from the 1.5.0 release.  Checkpoint every second, dump stats every 30 sec.

src/riak_kv_wterl_backend.erl

@@ -110,11 +110,13 @@ start(Partition, Config) ->
                         end,
                     ConnectionOpts = [Config,
                                       {create, true},
+                                      {sync, false},
                                       {logging, true},
                                       {transactional, true},
                                       {session_max, SessionMax},
                                       {cache_size, size_cache(Config)},
-				      {sync, false}
+                                      {checkpoint, [{wait, 1}]}, % sec
+                                      {statistics_log, [{wait, 30}]} % sec
                                       %% {verbose,
                                       %%   ["block", "shared_cache", "ckpt", "evict",
                                       %%         "evictserver", "fileops", "hazard", "lsm",

src/wterl.erl

@@ -272,6 +272,7 @@ fold(Cursor, Fun, Acc, {ok, Key, Value}) ->
 config_types() ->
     [{block_compressor, string},
      {cache_size, string},
+     {checkpoint, map},
      {create, bool},
      {direct_io, map},
      {drop, list},
@@ -293,10 +294,12 @@ config_types() ->
      {multiprocess, bool},
      {name, string},
      {session_max, integer},
+     {statistics_log, map},
      {sync, bool},
      {target, list},
      {transactional, bool},
-     {verbose, map}].
+     {verbose, map},
+     {wait, integer}].
 
 config_value(Key, Config, Default) ->
     {Key, app_helper:get_prop_or_env(Key, Config, wterl, Default)}.