Added banner to FileToPNG post

Author: ozaner

_posts/computer-science/00-0-0-filetopng.md

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+header:
+  overlay_image: /assets/images/projects/filetopng/splash.png
+  overlay_filter: 0.1
 title: Compression, Images, and FileToPNG
 date: 2018-01-16
 excerpt: "A writeup of the interesting observations I've made playing around with my FileToPNG project."