tweak image for echarty
diff --git a/images/extensions/echarty.jpg b/images/extensions/echarty.jpg
new file mode 100644
index 0000000..6a1f833
--- /dev/null
+++ b/images/extensions/echarty.jpg
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diff --git a/images/extensions/echarty.png b/images/extensions/echarty.png
deleted file mode 100644
index 75e8b5e..0000000
--- a/images/extensions/echarty.png
+++ /dev/null
Binary files differ