update developer setup info

delete obsolete ubuntu install file
use Makefile on travis

.travis.yml

@@ -28,7 +28,7 @@ cache:
 
 before_install:
   - composer self-update
-  - composer install
+  - make install-composer-deps
   - wget https://raw.githubusercontent.com/owncloud/administration/master/travis-ci/before_install.sh
   - bash ./before_install.sh mail $CORE_BRANCH $DB
   - cd ../core
@@ -37,8 +37,7 @@ before_install:
 
 before_script:
   - cd apps/mail
-  - sh -c "if [ '$TEST_JS' = 'TRUE' ]; then npm install --deps; fi"
-  - sh -c "if [ '$TEST_JS' = 'TRUE' ]; then npm run-script bower_deps; fi"
+  - sh -c "if [ '$TEST_JS' = 'TRUE' ]; then make dev-setup; fi"
 
 script:
   # Test lint

README.md

@@ -72,13 +72,14 @@ namespace inbox {
 
 ## Developer setup info
 
-Just clone this repo into your apps directory ([ownCloud core installation needed](https://doc.owncloud.org/server/8.1/developer_manual/general/devenv.html)). Additionally you need Composer to install PHP dependencies and npm to get the Javascript dependencies – run this from inside the mail folder:
+Just clone this repo into your apps directory ([ownCloud core installation needed](https://doc.owncloud.org/server/8.2/developer_manual/general/devenv.html)). Additionally,  [npm](https://docs.npmjs.com/getting-started/installing-node) is needed for installing JavaScript dependencies. On Debian and Ubuntu Systems it can be installed with the following command:
 ```bash
 sudo install node nodejs-legacy
-curl -sS https://getcomposer.org/installer | php
-php composer.phar install
 ```
-Debian/Ubuntu people, just execute `install_ubuntu.sh`
+Once npm is installed, PHP and JavaScript dependencies can be installed by running
+```bash
+make optimize-js
+```
 
 ### Nightly builds
 

install_ubuntu.sh

-#!/bin/bash
-
-# install node.js
-sudo apt-get install nodejs-legacy npm -y
-
-# get composer
-curl -sS https://getcomposer.org/installer | php
-
-# install composer dependencies
-php composer.phar install

js/README.md

+# JavaScript Development
+
+All source files are stored inside this directory or subdirectories of it. With the help of [requirejs](http://www.requirejs.org/)
+any .js and .html template file is loaded into the browser asynchronously if needed. Make sure you have 
+[debug mode](https://doc.owncloud.org/server/8.2/developer_manual/general/devenv.html#enabling-debug-mode) enabled in your development
+setup because this loads source files instead of the compressed one.
+
+## Optimizing file loading for production use
+
+While it's convenient to be able to change any source file and see those changes on the next page load, it takes some
+time to load 50+ files right after the browser has loaded the page. Fortunately, requirejs has an optimizer which can
+be easily executed with the Makefile in the root of this repository. Simply run
+```bash
+make opimize-js
+```
+inside the project's root directory. This combines and compresses all used JavaScript source files and HTML template
+files into one file: ``js/mail.min.js``. If [debug mode](https://doc.owncloud.org/server/8.2/developer_manual/general/devenv.html#enabling-debug-mode)
+is disabled, this compressed file is then used.
+