2156 - split edit.mu into multiple files

Now you can bring up the programming environment by saying:

  $ mu edit

The files under edit aren't yet *layers*, though, they have a few
dependencies that we need to clean up.

1 files changed, 1 insertions, 0 deletions

diff --git a/edit/Readme b/edit/Readme
new file mode 100644
index 00000000..d32fdf66
--- /dev/null
+++ b/edit/Readme
@@ -0,0 +1 @@
+Environment for learning programming using mu: http://akkartik.name/post/mu