title: add data sources to blaze server
body: <p>I want to run a blaze server which mounts two data sources, one postgreSQL table and one CSV file, but I dont know how can I mount more than one data source on blaze server. </p>
  
  <p>I have the following code on server side:</p>
  
  <pre><code>engine = create_engine('postgresql://user:pass@localhost:5432/mydb')
  with engine.connect() as conn:
      metadata=MetaData()
      metadata.bind=engine
      t=Table('t', metadata, autoload=True, autoload_with=conn)
  
  server=bz.Server(t)
  server.run(host='0.0.0.0', port=6363)
  </code></pre>
  
  <p>and in the client side:</p>
  
  <pre><code>source =Data('blaze://localhost:6363/')
  t=symbol('t', source.dshape)
  expr=t[t.color=='K']
  result=compute(expr, Data(source))
  </code></pre>
  
  <p>how can I mount another data source like CSV file or another table of the database on the same blaze server?
   for example:</p>
  
  <pre><code>csv= Data('.\data.csv', sep=';', has_header=True)
  </code></pre>
  
  <p><strong>Update:</strong></p>
  
  <p>I had to add the data sources as dictionary to my server, </p>
  
  <pre><code>engine = create_engine('postgresql://qfsa:123@localhost:5433/mydb')
  with engine.connect() as conn:
      metadata=MetaData()
      metadata.bind=engine
      table1=Data(Table('tablename1', metadata, autoload=True, autoload_with=conn))
      table2=Data(Table('tablename2', metadata, autoload=True, autoload_with=conn)
  csvfile=Data('.\data.csv', sep=';', has_header=True)
  resources={
          'table1': table1,
          'table2': table2,
          'csvfile': csvfile
  }
  </code></pre>