New less file for declare constants

src/stylesheets/less/constants.less

@@ -0,0 +1,8 @@
+
+@defaultTrasition : @easeOutSine;
+
+@header_footer_height: 40px;
+	@header_extended_height: 74px;
+@footer_toolbar_height: 48px;
+
+@header-height: 38px;