Prepare for v3.0.1

ExerciseChecker/package.json

 {
     "name"           : "dojo_exercise_checker",
     "description"    : "App that check an exercise of the Dojo project",
-    "version"        : "3.0.0",
+    "version"        : "3.0.1",
     "license"        : "AGPLv3",
     "author"         : "Michaël Minelli <dojo@minelli.me>",
     "main"           : "dist/app.js",