Change date format to ISO-8601

Author: vvasilev-

CHANGELOG.md

@@ -1,6 +1,6 @@
 ## CHANGELOG
 
-### 1.0.2 (01.06.2015)
+### 1.0.2 (2015-06-01)
 ---------------------
 
 - Added tests & Travis CI
@@ -9,14 +9,14 @@
 - Fixed bug with groupBy & filterBy functions in gulp tasks
 - Fixed css properties order in external stylesheet - (thanks to [Vasilij Chernov](https://github.com/bivihoba))
 
-### 1.0.1 (28.05.2015)
+### 1.0.1 (2015-05-28)
 ---------------------
 
 - Fixed verbose option.
 - Fixed confusing parts README.
 - Fixed bug with spriteRef when the image is undefined.
 
-### 1.0.0 (27.05.2015)
+### 1.0.0 (2015-05-27)
 ---------------------
 
 - Initial version.