Add a few more items to change list

This is in preparation for hopefully our final trial release before
v0.22.

[skip ci]

Changes

@@ -1,19 +1,22 @@
 Revision history for Selenium-Remote-Driver
 
-0.2151 10-10-2014
+0.2152    10-10-2014
         [NEW FEATURES]
         - Improved error messaging for Saucelabs non-json cases
         - Improved error messaging for incorrectly configured chromedrivers
-        - Add maximize_window endpoint
+        - #169 Add maximize_window function
+        - #58 Add get_user_agent function
 
         [MAINTENAINCE]
         - Specify minimum compatible version of Moo dep
         - Make Driver.pm more easily subclassed ( ea68e06, 63e78e3 )
         - Get TravisCI passing again
-        - Roll & use our own mocking classes #164
+        - #164 Roll & use our own mocking classes
+        - #152 Gracefully catch more error cases
 
         [BREAKING]
-        - get|set_speed subs are no-ops and will be removed in the upcoming release
+        - #161 get|set_speed subs are no-ops and will be removed in the upcoming release
+        - #158 WebElement's drag function is deprecated. Use mouse_move_to_location in the interim
 
 0.2102 7-16-2014
         [NEW FEATURES]