plugin removed, it was incorporated into AddDemandPlannerGenerator plugin

dream/plugins/ReadDemandPlannerExcelInput.py

-from copy import copy
-import json
-import time
-import random
-import operator
-import StringIO
-import xlrd
-
-from dream.plugins import plugin
-
-class ReadDemandPlannerExcelInput(plugin.OutputPreparationPlugin):
-  """ Example on how to read an excel spreadsheet 
-  """
-
-  def preprocess(self, data):
-    """ Example showing how to read an attached file
-    """
-    # Attachement is encoded in data uri, ie data:application/excel;base64,***
-    data_uri_encoded_input_data = data['input'].get(self.configuration_dict['input_id'], {})
-    if data_uri_encoded_input_data:
-        mime_type, attachement_data = data_uri_encoded_input_data[len('data:'):].split(';base64,', 1)
-        attachement_data = attachement_data.decode('base64')
-        
-        workbook = xlrd.open_workbook(file_contents=attachement_data)
-    
-        print "This spreadsheet contains sheets:", workbook.sheet_names()
-
-    #raise ValueError(workbook.sheet_names())
-    
-    return data
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