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/gs.snippet

@@ -0,0 +1,9 @@
+//getter for $3
+public ${2:variable_type} get${1:VariableName}() {
+    return ${3:variableName};
+}
+
+//setter for $3
+public void set$1($2 $3) {
+   this.$3 = $3;
+}${4}