Updated tutorial west_300

doc/tutorials/westpy_300.ipynb

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 <h1>RESTful Tutorials</h1>
 
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 We will show here how to interact with the remote server where the `pw.x`, `wstat.x` and `wfreq.x` are already installed.
 
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 We start by importing WESTPy and generating a ground state input file for methane.
 
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 ``` python
 from westpy import *
 ```
 
 %%%% Output: stream
 
     
      _    _ _____ _____ _____
     | |  | |  ___/  ___|_   _|
     | |  | | |__ \ `--.  | |_ __  _   _
     | |/\| |  __| `--. \ | | '_ \| | | |
     \  /\  / |___/\__/ / | | |_) | |_| |
      \/  \/\____/\____/  \_/ .__/ \__, |
                            | |     __/ |
                            |_|    |___/
     
-    WEST version     :  3.1.0
-    Today            :  2018-09-19 15:02:57.396652
+    WEST version     :  3.1.1
+    Today            :  2018-09-19 15:33:45.581889
 
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 ``` python
 geom = Geometry()
 ```
 
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 ``` python
 geom.setCell((25,0,0),(0,25,0),(0,0,25))
 ```
 
 %% Cell type:code id: tags:
 
 ``` python
 geom.addAtomsFromOnlineXYZ( "http://www.west-code.org/doc/training/methane/CH4.xyz" )
 ```
 
 %% Cell type:code id: tags:
 
 ``` python
 geom.addSpecies( "C", "http://www.quantum-simulation.org/potentials/sg15_oncv/upf/C_ONCV_PBE-1.0.upf")
 geom.addSpecies( "H", "http://www.quantum-simulation.org/potentials/sg15_oncv/upf/H_ONCV_PBE-1.0.upf")
 ```
 
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 ``` python
 gs = GroundState(geom,xc="PBE",ecut=40.0)
 ```
 
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 ``` python
 gs.generateInputPW()
 ```
 
 %%%% Output: stream
 
     
     Generated file:  pw.in
 
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 We now create a session on the remote server.
 
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 ``` python
-session = Session("marco.outatime@gmail.com")
+session = Session("your.email@domain.edu")
 ```
 
 %%%% Output: stream
 
     Check the inbox/spam folder of your email and click on the link to activate the session
 
 %% Cell type:code id: tags:
 
 ``` python
-status = session.status()
-print(status)
+session.status()
 ```
 
-%%%% Output: stream
+%%%% Output: execute_result
 
-    {'Active': 'True', 'Time Left': '49 minutes'}
+    {'Active': 'True', 'Time Left': '59 minutes'}
 
 %% Cell type:code id: tags:
 
 ``` python
 download = ["http://www.quantum-simulation.org/potentials/sg15_oncv/upf/C_ONCV_PBE-1.0.upf","http://www.quantum-simulation.org/potentials/sg15_oncv/upf/H_ONCV_PBE-1.0.upf"]
 pw_output = session.run("pw","pw.in","pw.out",download,3)
 ```
 
 %%%% Output: stream
 
     Requested to run executable pw on server imedevel.uchicago.edu
     Generated  pw.out
 
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 We now generate the input for `wstat.x`.
 
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 ``` python
 data = {}
 data["input_west"] = {}
 data["input_west"]["qe_prefix"] = "calc"
 data["input_west"]["west_prefix"] = "calc"
 data["input_west"]["outdir"] = "./"
 data["wstat_control"] = {}
 data["wstat_control"]["wstat_calculation"] = "S"
 data["wstat_control"]["n_pdep_eigen"] = 5
 
 writeJsonFile("wstat.in",data)
 ```
 
 %%%% Output: stream
 
     
     File written :  wstat.in
 
 %% Cell type:code id: tags:
 
 ``` python
 wstat_output = session.run("wstat","wstat.in","wstat.out",download,3)
 ```
 
 %%%% Output: stream
 
     Requested to run executable wstat on server imedevel.uchicago.edu
-    Session Expired! Invalid Request sent, Please recreate session and recheck your input.
-    the JSON object must be str, bytes or bytearray, not dict
+    Generated  wstat.out
 
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 We now generate the input for `wfreq.x`.
 
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 ``` python
-data = {}
 data["wfreq_control"] = {}
 data["wfreq_control"]["wfreq_calculation"] = "XWGQ"
-data["wfreq_control"]["n_pdep_eigen_to_use"] = 50
+data["wfreq_control"]["n_pdep_eigen_to_use"] = 5
 data["wfreq_control"]["qp_bandrange"] = [1,5]
 data["wfreq_control"]["n_refreq"] = 300
 data["wfreq_control"]["ecut_refreq"] = 2.0
 
 writeJsonFile("wfreq.in",data)
 ```
 
 %%%% Output: stream
 
     
     File written :  wfreq.in
 
 %% Cell type:code id: tags:
 
 ``` python
-wfreq_output = session.run("wfreq","wfreq.in","wfreq.out",3)
+wfreq_output = session.run("wfreq","wfreq.in","wfreq.out",download,3)
 ```
 
 %%%% Output: stream
 
     Requested to run executable wfreq on server imedevel.uchicago.edu
-    Server failed with the following error
-     can only join an iterable
+    Generated  wfreq.out
 
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 We now stop the session.
 
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 ``` python
 session.stop()
 ```
 
+%%%% Output: execute_result
+
+    {'Success': 'Session removed and cleared'}
+
 %% Cell type:code id: tags:
 
 ``` python
 ```