Merge pull request #6 from mattecalcio/master

Update mailermailer-api-php wrapper to 1.0.4
Merge pull request #7 from mattecalcio/master

Don't display hidden fields
Merge pull request #8 from mattecalcio/master

Bump up version
Merge pull request #9 from mattecalcio/master

Update 'Tested up to' version