Laravel 5 support breaking Laravel 4 support

[ghost]

Just reporting feedback for commit #3696417

While you updated the support to Laravel 5 and tried to not break the Laravel 4 support, you unfortunately did it, explaining what you did :

if (starts_with($this->app->version(), '5'))
{
    $this->loadTranslationsFrom($this->app->basePath() . '/vendor/jenssegers/date/src/lang', 'date');
}
// Laravel 4 package registration
else
{
    $this->package('jenssegers/date');
}

But in Laravel 4 $this->app->version() method doesn't exist at all and will throw a beautiful Call to undefined method Illuminate\Foundation\Application::version(), so how we fix it, just checking if the method exists before calling it for version check :

if (method_exists($this->app, 'version') && starts_with($this->app->version(), '5'))
{
    $this->loadTranslationsFrom($this->app->basePath() . '/vendor/jenssegers/date/src/lang', 'date');
}

Please review this PR #78, tested on L5 and L4 as working, also with Travis CI.