text: Title: How to configure the LSTM sequence generator ?
  Body: Hello there ! 
  I have a few questions and issues when running the seq generator scripts. 
  
  When I try the shakespeare script, it runs for 24h with about 1,300,000 iterations without outputting anything. 
  - Is it that too big for my small CPU ? 
  - Is there any way to configure the stopping iteration when fitting the data ?
  - Is it possible to display intermediary outputs in the generation so that we can observe how far the RNN understands the data ?
  
  And small issues :
  - When I'm running the city names generator, I got an error of "list index out of range" preventing me from trying the script
  - Either examples (city and shakespeare) don't work if I enter the activation, loss and optimizer arguments in the last layer like in the script. It only works when I let the default parameters by commenting the arguments. 
  
  Thanks a lot, 
  Theo 
  