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/vim-snippets/snippets/haml.snippets

@@ -0,0 +1,20 @@
+snippet t
+	%table
+		%tr
+			%th
+				${1:headers}
+		%tr
+			%td
+				${2:headers}
+snippet ul
+	%ul
+		%li
+			${1:item}
+		%li
+snippet =rp
+	= render :partial => '${1:partial}'
+snippet =rpl
+	= render :partial => '${1:partial}', :locals => {}
+snippet =rpc
+	= render :partial => '${1:partial}', :collection => @$1
+