Organize assets directory, include README file, add new 3D logo variant

Author: hugo-dc

assets/README.md

@@ -0,0 +1,18 @@
+# Assets
+
+This directory contains some assets related to the ewasm project, such as
+demonstration pictures and the logo design files and renders.
+
+## Content
+
+- `README.md` - This file
+- `blocks.png` - Example of blockin WebAssembly Text Format
+- `if.png` - Example of counting wasm opcodes in an If statement.
+- `hexagon-sticker` - Files used to create the hexagon sticker4s with the Ewasm
+  logo
+- `logo` - Ewasm logo rendered files
+- `logo-and-text` - Ewasm logo files which includes the text "ewasm"
+- `logo3d` - A 3D variant of the Ewasm logo
+- `src` - Source files (SVG, AI, EPG) corresponding to the logo.
+
+###