add nanosvg package (#50)

nanosvg/build.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+set -e
+
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
+cd "$DIR"
+
+COMMIT="5cefd9847949af6df13f65027fd43af5a7513633"
+INSTALL_DIR="$DIR/nanosvg/install"
+
+# Clone/update source
+if [ ! -d "nanosvg-src/.git" ]; then
+  rm -rf nanosvg-src
+  git clone --depth 1 https://github.com/memononen/nanosvg.git nanosvg-src
+fi
+git -C nanosvg-src fetch --depth 1 origin "$COMMIT"
+git -C nanosvg-src checkout --force FETCH_HEAD
+
+# Copy headers
+rm -rf "$INSTALL_DIR"
+mkdir -p "$INSTALL_DIR/include"
+cp nanosvg-src/src/nanosvg.h "$INSTALL_DIR/include/"
+cp nanosvg-src/src/nanosvgrast.h "$INSTALL_DIR/include/"
+
+echo "Installed nanosvg to $INSTALL_DIR"
+du -sh "$INSTALL_DIR"