Convert garden-o-matic guts over to promises where appropriate

Tools/GardeningServer/scripts/svn-log.js

Index: Tools/GardeningServer/scripts/svn-log.js
diff --git a/Tools/GardeningServer/scripts/svn-log.js b/Tools/GardeningServer/scripts/svn-log.js
index cd273f7dfe012c285a0fa651c405eefa71487007..d02f3be6f609e175f27902999bbb735712d1e498 100644
--- a/Tools/GardeningServer/scripts/svn-log.js
+++ b/Tools/GardeningServer/scripts/svn-log.js
@@ -105,17 +105,11 @@ trac.changesetURL = function(revision)
     return config.kBlinkRevisionURL + '?' + $.param(queryParameters);
 };
 
-trac.recentCommitData = function(path, limit, callback)
+trac.recentCommitData = function(path, limit)
 {
-    net.xml('http://blink.lc/blink/atom').then(function(commitData) {
-        callback(parseCommitData(commitData));
+    return net.xml('http://blink.lc/blink/atom').then(function(commitData) {
+        return parseCommitData(commitData);
     });
 };
 
-trac.commitDataForRevisionRange = function(path, startRevision, endRevision, callback)
-{
-    var key = [path, startRevision, endRevision].join('\n');
-    g_cache.get(key, callback);
-};
-
 })();