Bump version to 1.0.4

GMRefresh.podspec

@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = "GMRefresh"
-  s.version          = "1.0.3"
+  s.version          = "1.0.4"
   s.summary          = "基于MJRefresh做的下拉刷新，自动加载更多"
   s.homepage         = "http://git.wanmeizhensuo.com/gengmeiios/GMRefresh.git"
   s.license          = 'MIT'