change mantid to get data from earthworm

[durong]

1. change to earthworm framework, only for detector

   try:
       from cStringIO import StringIO as memfile  ## for Python 2
   except ImportError:
       from io import BytesIO as memfile     ## for Python 3
   import numpy as np
   
   _json=neonRedis_read.get(path)
   data=np.load(memfile(_json))
   
   

2. load data inro workspace:

use CreateWorkspace? algorithm

3. the time of one module is 0.4s alone, 5~10s when all modules run.

refreshtime is set to be 10