Added list of methods for autocomplete
Added list of methods for autocomplete

Added list of available methods to the PHPDoc section of `Flight` class. Inspired by suggestion: http://stackoverflow.com/a/26628288/1363799
mikecao/flight,rakesh-mohanta/flight-1,kerkness/flight,mikecao/flight,kerkness/flight,hebaoxia/flight,tempbottle/flight