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Merge branch 'master' of github.com:piwik/piwik
Fix build and make comparison more explicit for all format except binary format pdf
run git pull before git commit
#5300 Log when trying to send the same report twice
Refactorings in ScheduledReports to remove useless indentation

I have refactored the code a bit to make it (hopefully) more readable. I have replaced this:

```php
if (self::manageEvent($reportType)) {
    // do something
}
```

By this:

```php
if (! self::manageEvent($reportType)) {
    return;
}

// do something
```

It's not much but it removes one level of indentation in almost the whole class, which is kind of nice.

FYI, this is one of the "object calisthenics" rules.