Update Makefile, use tabs and remove duplicate js

Makefile

@@ -12,7 +12,7 @@ sign_dir=$(build_dir)/sign
 cert_dir=$(HOME)/.nextcloud/certificates
 
 
-all: appstore
+default: build
 
 clean-build:
 	rm -rf $(build_dir)
@@ -21,10 +21,6 @@ clean-dist:
 	rm -rf js/node_modules
 	rm -rf js/vendor
 
-install-npm-deps-dev:
-	cd js && npm install --deps
-	cd js && bower install
-
 install-deps:
 	cd js && npm install --deps
 	cd js && bower install
@@ -34,6 +30,9 @@ build: build-js
 build-js:
 	$(MAKE) -C js build
 
+watch:
+	$(make) -C js watch
+
 # appstore: clean install-deps
 appstore: clean-build build
 	rm -rf $(appstore_build_directory)