Adding Guzzle HTTP to work with REST applications

ci/install.sh

@@ -26,4 +26,4 @@ else
 	cd $CI_PROJECT_NAME
 fi
 
-composer install
+composer install || composer update

composer.json

 {
     "require": {
         "bcosca/fatfree": "^3.5",
-        "firebase/php-jwt": "^4.0"
+        "firebase/php-jwt": "^4.0",
+	"guzzlehttp/guzzle": "~6.0"
     }
 }