Merge branch '16-mysqli_ping-naar-losse-functie' into 'master'

version bump

Closes #16

See merge request !30

composer.json

 {
     "name": "timmit/db-mysql",
     "description": "A simple DB layer in PHP for using MySQL(i)",
-    "version": "v4.1.0",
+    "version": "v4.1.1",
     "keywords": ["DB", "MySQL", "MySQLi", "database", "DB layer", "database layer"],
     "license": "MIT",
     "homepage": "http://www.TiMMiT.nl/",