worked again on image sizes for HTML and PDF

diff --git a/images/stl_loop_count_01b.png b/images/stl_loop_count_01b.png
new file mode 100755 (executable)
index 0000000..3f5620c
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diff --git a/images/stl_multiple_clients_01b.png b/images/stl_multiple_clients_01b.png
new file mode 100755 (executable)
index 0000000..5e68344
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