buildFileURL clear cache fix

sugarapi.diff

diff --git a/lib/sugarapi/sugarapi.js b/lib/sugarapi/sugarapi.js
index e2c2b86..a052b95 100644
--- a/lib/sugarapi/sugarapi.js
+++ b/lib/sugarapi/sugarapi.js
@@ -270,6 +270,8 @@ SUGAR.Api = (function() {
             _accessToken = null,
             _refreshToken = null,
             _downloadToken = null,
+            //Api Initialization time
+            _apiInitTime = null,
             // request queue
             // used to support multiple request while in refresh token loop
             _rqueue = [],
@@ -303,6 +305,15 @@ SUGAR.Api = (function() {
                     callback(["AuthAccessToken", "AuthRefreshToken", "DownloadToken"]);
                 });
             }
+
+            
+            //Create or use existing Api initialization time
+            if(_keyValueStore.get("ApiInitTime")){
+                _apiInitTime = _keyValueStore.get("ApiInitTime");
+            }else{
+                _apiInitTime = (new Date()).getTime()
+                _keyValueStore.set("ApiInitTime", _apiInitTime);
+            }
         }
 
         _refreshingToken = false;
@@ -706,6 +717,7 @@ SUGAR.Api = (function() {
              * @member SUGAR.Api
              */
             buildFileURL: function(attributes, options) {
                 var params = {};
                 options = options || {};
                 // We only concerned about the format if build URL for an actual file resource
@@ -731,7 +743,7 @@ SUGAR.Api = (function() {
                 }
 
                 if (options.cleanCache === true) {
-                    params[(new Date()).getTime()] = 1;
+                    params[this.getApiInitTime()] = 1;
                 }
 
                 if (options.platform !== undefined) {
@@ -757,6 +769,10 @@ SUGAR.Api = (function() {
                 return _keyValueStore ? _keyValueStore.get("AuthRefreshToken") || _refreshToken : _refreshToken;
             },
 
+            getApiInitTime: function() {
+                return _keyValueStore ? _keyValueStore.get("ApiInitTime") || _apiInitTime: _apiInitTime;
+            },
+
             /**
              * Returns the current download token.
              */