Updates CHANGELOG and AUTHORS

AUTHORS.md

@@ -101,4 +101,8 @@ People and companies, who have contributed, in alphabetical order.
 
 
 **@SkuliOskarsson (Skuli Oskarsson)**
-- Fixes some texts in README II
+- Fixes some texts in README II
+
+
+**@yuyabee**
+- Fixed README

CHANGELOG.md

@@ -1,7 +1,8 @@
-##Changelog
+#Changelog
 
-###Gin 0.4 (??)
+###Gin 0.4 (Aug 21, 2014)
 
+- [NEW] Development mode
 - [NEW] Unit tests
 - [NEW] Add Content.Redirect()
 - [FIX] Deferring WriteHeader()