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/class/basic.snippet

@@ -0,0 +1,14 @@
+/**
+ * class $2
+ * @author ${4:`g:snips_author`}
+ */
+${1:public} class ${2:`Snippet_JavaClassNameFromFilename()`}${3} {
+
+	/**
+	  * Constructor for $2
+	  */
+	public $2(${5}){
+		${6}
+	}
+
+}