added start and stop entries

enhanced administration of activities/projects/customers
added navbar for active records and recent activities
added edit timesheet entry form
added translation packages for errors and flashmessages
upgraded composer packages

composer.json

@@ -32,7 +32,7 @@
         "sensio/distribution-bundle": "^5.0",
         "sensio/framework-extra-bundle": "^3.0",
         "symfony/assetic-bundle": "^2.8",
-        "symfony/monolog-bundle": "^2.8",
+        "symfony/monolog-bundle": "^3.1",
         "symfony/swiftmailer-bundle": "^2.3",
         "symfony/symfony": "~3.4",
         "twig/extensions": "^1.3",