Merge branch 'implement_5.0' into 'master'

composer.json

composer.lock

config.sample.php

less/main.less

public/css/main.css

public/index.php

src/Controllers/Controller.php

src/Core.php

src/Models/ScriptState.php

src/Views/download_lockup_files.php

src/Views/home.php

src/Views/localfooter.php

src/Views/lockup_library.php

src/Views/main_template.php

src/Views/manage_lockups.php

src/Views/new_lockup.php

src/Views/not_found.php

src/Views/preview_lockup.php

src/Views/regenerate.php