Some tweaks: Continue training, graph Y axis ticks

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I have made some useful (for me) changes to the code, which might be useful to 
others.

The changes are:
- Add ticks and labels to Y axis
- Add Training normal continued menu option, to continue with training a network
- Make normal train log messages have 8 decimal places
- Add menu option to show info of neural net currently in memory. 

The main two issues are: 1) being able to stop training, tweak training values, 
and continue from where you left off.
And 2), the graph shows a scale so its clear how fast the error is really 
changing.

I would be happy to provide the changes for consideration on inclusion in the 
main code.

Original issue reported on code.google.com by pwbec...@hotmail.com on 5 Aug 2014 at 8:06