Added octave compatibility to run demo #1

[samos123]

• Fixed save function to save as v7 format if octave is used.
• When Octave is used don't use RandStream to set the seed.
• When Octave is used don't create a matlabpool, this means that octave users currently can't use the multicore functionality. But Matlab users are still able to.
• Updated readme about octave compatibility

NOTE: There may still be other compatibility issues I only made it possible to run the Demo on octave.

This patch does not influence any of the existing matlab behaviour and checks whether the user uses Octave. It should be a relatively "safe" patch.

I'm still an Octave/Matlab beginner so careful review would be appreciated.

[adikhosla]

Thanks for the updates! I have merged them, and will make some minor modifications to better suit them. I do not use Octave, so please let me know if it breaks Octave compatibility again.