Allow content to be output without a trailing newline character

Sometimes it's useful to output content without a trailing newline, eg:
```php
for ($i = 0; $i < 5; ++$i) {
    $climate->inline("checking something... ");
    if (doLongRunningTask()) {
        $climate->out("worked fine");
    } else {
        $climate->out("failed");
    }
}
```

Would output:
```
checking something... worked fine
checking something... worked fine
checking something... worked fine
checking something... failed
checking something... failed
```

Or sometimes if I don't know how many total items I am working with I will output periods to indicate progress:
```php
while (getStuff()) {
    $climate->inline(".");
}
$climate->br();
```