Start of a readme

colrv1/README.md

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+# COLRv1 Build
+
+Assumptions:
+
+* bitmap font already exists.
+* a font that contains complete emojicompat metadata exists
+
+## Build Steps
+
+1. Compile the COLRv1 fonts
+
+   ```shell
+   time nanoemoji *.toml
+   ```
+
+1. Post-process COLRv1 font for Android
+   * At time of writing only the noflags version is for Android

colrv1/requirements.txt

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+nanoemoji >= 0.9.12  # we need latest spec support