modifies stom.saveResults to save allresults in pwd.
modifies data_for_fuelpin and fixes bug in stom.saveResults

modifies data_for_fuelpin to perform 4 calculations.
fixes bug in stom.saveResults. First checks if Results folder exists.
If not creates Results folder. Saves allresults.mat in pwd.
adds safety coefficients for fuelpin
adds new stop object
fixes bugs in stop. ready to be tagged
adds check for index in stom.runCalculation
adds sphere case, modifies fuelpinburn

Adds a new case for spherical critical ball.
Finalizes fuelpinburn case with real perturbations.
Comments 'ADFS' and 'ADFC'
Some polishing in README.md