Add dist.sh script to automatically build and create project template, Update README

dist.sh

@@ -0,0 +1,22 @@
+set -e
+
+function log {
+    echo -e "\033[1;36m***** $@ *****\033[0m"
+}
+
+log Building application
+
+VERSION="$(godot --headless --no-header -s tools/get_version.gd)"
+
+godot --headless --export-release "Linux/X11" "dist/Fragmented-${VERSION}.x86_64"
+
+log Packing project template
+
+ZIP_PATH=$(realpath "dist/Fragmented-${VERSION}_project_template.zip")
+
+rm -f "${ZIP_PATH}"
+zip -r "${ZIP_PATH}" shaderlib/
+(
+    cd examples/
+    zip -r "${ZIP_PATH}" *
+)