add in a brief cell structure diagram

svn:r1036

1 files changed, 189 insertions, 0 deletions

diff --git a/doc/cell-struct.eps b/doc/cell-struct.eps
new file mode 100644
index 0000000000..f5debaa6dd
--- /dev/null
+++ b/doc/cell-struct.eps
@@ -0,0 +1,189 @@
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