Added QUEUE_DRIVER to .env.example

Update app.blade.php

Update app.blade.php

Updated Run The Application comment

Remove inline styling, add class to link

Get rid of npm warning: "npm WARN package.json @ No repository field."

Remove executable status from queue config.

Use relative href on 503 font path

Added <title> tag

config options for larval/framework pr #7409

remove unused use statements

Have logical default for Queue Driver when testing

[5.0] Set mail config values in .env file.

Glyphicons are absent from Bootstrap

added default url type to Rackspace Cloud Files config to match the pr #7409 in laravel/framework

Doing so negates the need inline styling, as Bootstrap has a `btn-link` class which works with grouped buttons.