updated pictures for documentation
diff --git a/docs/pictures/sar.png b/docs/pictures/sar.png
new file mode 100644
index 0000000..9447446
--- /dev/null
+++ b/docs/pictures/sar.png
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diff --git a/docs/pictures/xschem.png b/docs/pictures/xschem.png
index eaa11ee..48845e1 100644
--- a/docs/pictures/xschem.png
+++ b/docs/pictures/xschem.png
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