Merge pull request #9 from mohsalvi/master

Preparing intefaces for GUI (by Mohsan)
Joachim edits before release
Uncapitalized a letter
Added minor description
Ignoring old stuff
Linux temp file
Slightly change FHR on case 5a
Update main_fecg_model.m
Joachim ading script for ICA and PCA
Removing deprecated code
Removing deprecated code
Delete challenge_stats.m
Corrected noise generation

Some small bug with sampling frequency lower than NSRDB's fs
Now it works.
Wrong FS taken
Set default HRV to Normal Sinus Rythm
Corrected theta generation in hrv generator
Phase generator
Update generate_ecg_mixture.m

Solved compatibility issues with simulations without foetus (adult ECG).
Update and rename README.txt to README.MD