Dialogflow

[sirtorry]

samples for Dialogflow client library release, modelled after python samples.

[davidcavazos]

Very nice README documentation, thank you! :)

[bshaffer]

@dpebot Merge when green

[tigsdev]

 Uncaught Exception: Error occurred during parsing: No such field: date-time
 in /home/dialog/vendor/google/gax/src/Transport/RestTransport.php:124
Stack trace:
#0 /home/dialog/vendor/google/gax/src/Transport/RestTransport.php(124): Google\Protobuf\Internal\Message->mergeFromJsonString('{\n  "responseId...')
#1 /home/dialog/vendor/guzzlehttp/promises/src/Promise.php(203): Google\ApiCore\Transport\RestTransport->Google\ApiCore\Transport\{closure}(Object(GuzzleHttp\Psr7\Response))
#2 /home/dialog/vendor/guzzlehttp/promises/src/Promise.php(156): GuzzleHttp\Promise\Promise::callHandler(1, Object(GuzzleHttp\Psr7\Response), Array)
#3 /home/dialog/vendor/guzzlehttp/promises/src/TaskQueue.php(47): GuzzleHttp\Promise\Promise::GuzzleHttp\Promise\{closure}()
#4 /home/dialog/vendor/guzzlehttp/guzzle/src/Handler/CurlMultiHandler.php(98): GuzzleHttp\Promise\TaskQueue->run()
#5 /home/dialog/vendor/guzzlehttp/guzzle/src/Handler/CurlMultiHandler.php(125): GuzzleHttp\Handler\CurlMultiHandler->tick()
#6 /hom in <b>/home/dialog/vendor/google/gax/src/Transport/RestTransport.php</b> on line <b>124</b><br />

[dwsupplee]

@tgssb Thanks for bringing this to our attention, could you please create an issue on google-cloud-php including a code snippet which triggered this error?