Updated all plugins that are non-forked. Added some new plugins.

Added update_plugins.py which can fetch new plugins from GitHub.

New plugins added: zencoding, vim-indent-object, taglist, nginx.vim

sources_non_forked/snipmate-snippets/java/for.snippet

@@ -0,0 +1,3 @@
+for(${1:int i=0}; ${2:condition}; ${3:i++}){
+	${4}
+}