Add a README in the zsh_local directory, remove placeholder
Isn't a README much more useful than the previous placeholder?
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/zsh_local/README Sat Jul 14 19:31:01 2012 +0200
@@ -0,0 +1,13 @@
+
+Zsh local configuration
+
+You can create a file zshrc in this directory, which will be sourced during
+zsh initialization.
+
+You can also add files NN-name.zrc (see the zshrc.d directory) which will be
+sourced at the end of the main zshrc.
+
+Please don't hesitate to send me feedback (or improvements).
+
+Mikael
+Email/Jabber: <mikael@lilotux.net>