add image file object
configure translation tools
replace default controller with welcome controller
remove translation file

Not sure yet how translation will be handled. However, though, it’ll
probably be using yml files, for conveniency.
switch from yml to annotation for routing
add several useful bundles

Run composer.phar install
add bundles configuration
add less files architecture
add jquery.min
improve base view
add navbar
add welcome index view
add image file data fixtures

With your local server on, run:
```
php bin/console doctrine:database:create
php bin/console doctrine:schema:create
php bin/console doctrine:fixtures:load
```