Add includeLibraryParam setter

[davidrapson]

Adds a setIncludeLibraryParam setter method in the same style as the other constructor options. Without it it's required to pass through all arguments to the constructor which is not ideal without named parameters.

Before:

$builder = new UrlBuilder(
    'some-imgx-domain.example.com',
    true,
    "",
    ShardStrategy::CRC,
    false
);

After:

$builder = new UrlBuilder('some-imgx-domain.example.com');
$builder->setUseHttps(true);
$builder->setIncludeLibraryParam(false);

[davidrapson]

Just noticed there's already a PR open for this #16

That one was opened back in March 2017 so let me know if I should close this one, or allow this to supersede the previous one.

[jayeb]

Thanks @davidrapson! This is out in version 2.1.0 now.