changed change history

CHANGES.md

 ## Change History ##
 
+### December 2016 to May 2017 ###
+- crosshairs
+- handling of VRT without memory leakage (VRT_SHARED_SOURCE = 0)
+- temporal pixel profiles with sensor-specific scaling functions
+- test data (Landsat + RapidEye)
+- refactoring of GUI and class names
 
-### December 2016 ###
 
-- refactoring
-
-
-### June 2015 ###
\ No newline at end of file
+### June 2015 ###