add package suggestions (proctitle and redis extensions)

Author: chrisboulton

composer.json

@@ -21,6 +21,10 @@
 		"php": ">=5.3.0",
 		"colinmollenhour/credis": "dev-master"
 	},
+	"suggest": {
+		"ext-proctitle": "Allows php-resque to rename the title of UNIX processes to show the status of a worker.",
+		"ext-redis": "Native PHP extension for Redis connectivity. Credis will automatically utilize when available."
+	},
 	"require-dev": {
 		"phpunit/phpunit": "3.7.*"
 	},