commit ec810f21f528b2262485fc102f4feeb9b6da0163
Author: Matthew Butterick <mb@Matthews-MacBook-Air-2.local>
Date:   Thu Aug 1 14:59:10 2013 -0700

    ignore .DS_store

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..63123fb
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.DS_store