Adds graph mock or sensors

Added flotr2.js and basic graph mock for sensor value graphing
Default language fix & jsPlumb integration poc

Experimenting with jsplumb
Fixed 404 when brower locle wasn't available
Improves scenario mockup page

Added css and fixes few errors
Merge branch 'devel' into feature/cartels

* devel:
  Scheduler instanciates clients from .json scenario
  Adds functional sound handling
  Implements more efficient scheduler
  Changes logging so class name in included