Add support for multicore platforms

Schema for storing the platform cores and task-to-core assignments:

"CoreStore": [
  {"name":"c1", "speedup":1},
  {"name":"c2", "speedup":1}
],
"TaskStore": [
  {
    "name":"t1",
    "priority":6,
    "initialOffset":0,
    "activationOffset":0,
    "duration":1000000,
    "period":3000000,
    "inputs":["in1"],
    "outputs":["out1"],
    "wcet":200000,
    "acet":100000,
    "bcet":0,
    "distribution":"Normal",
    "core":"c1"
  }
]

mkuo005 / LET-LP-Scheduler

Add support for multicore platforms #5