diff --git a/doc/img/logo1.png b/doc/img/logo1.png new file mode 100644 index 0000000..36b993e Binary files /dev/null and b/doc/img/logo1.png differ diff --git a/doc/ppt/logo.pptx b/doc/ppt/logo.pptx new file mode 100644 index 0000000..de8b59f Binary files /dev/null and b/doc/ppt/logo.pptx differ