Added CHANGELOG.md file

Author: castarco

CHANGELOG.md

@@ -0,0 +1,16 @@
+ColorSharp's Changelog
+======================
+
+## 2014-11-05 : 0.6.0 Release
+
+### Contributors
+ * Andrés Correa Casablanca <castarco@gmail.com , castarco@litipk.com>
+
+### Changes
+ * Improved XML documentation.
+ * Removed many build warnings (related with XML documentation)
+ * Sealed many classes.
+ * Removed unused properties from CIExyY class.
+
+### Bugfixes
+ * Bugfix in sRGB->CIE's 1931 XYZ conversion (the gamma correction was done after the lineal transformation)