Create basic routine to automatically build a new release

Makefile

@@ -13,9 +13,26 @@ all: package
 
 package: $(PACKAGES)
 
+.PHONY: npm
+npm:
+	cd slt; npm i
+	cd slt; npm run sass
+
 .PHONY: slt.tar.gz
-slt.tar.gz:
-	cd slt ; tar czf ../$@ *
+slt.tar.gz: npm
+	# cd slt ; tar czf ../$@ *
+	tar czf $@ -C slt \
+		css/dynamic-styles.css.php css/index.html css/style.css css/.htaccess \
+		html \
+		images \
+		js \
+		language \
+		favicon.ico \
+		index.html \
+		index.php \
+		template_preview.png \
+		template_thumbnail.png \
+		templateDetails.xml
 
 .PHONY: release
 release: slt.tar.gz