Fix #373 Document that annotations must use double quotes
Fix #373 Document that annotations must use double quotes

Rastusik/PHP-DI,mnapoli/PHP-DI,jaakon/PHP-DI,jaakon/PHP-DI,Rastusik/PHP-DI,jubianchi/PHP-DI,mnapoli/PHP-DI,PHP-DI/PHP-DI,PHP-DI/PHP-DI,jubianchi/PHP-DI