Changed everything to use own Density functions, fixed bug of FWHM instead of sigma

Signed-off-by: LukasHehn <lukas.hehn@ik.fzk.de>
Improved plotting options
Keep generated MC toy data
Added calculation of 90% C.L. from Monte Carlo toy data fits
Fixed RooMCstudy so it can do 10,000 toy sets now. Increased range of all event numbers from 0 to (events)
Different minor code changes
Code completeley rewritten in terms of readability
Even more changes to the code to better follow PEP8 style guide. Script works properly
Simplified and improved code
Working version of fitting signal to background only MC toy sets. Pull plots deactivated because the cause crash for signal parameter
Changed all constants to CAPITAL CASE. Reformated output,
Functions now have binning as parameter. Modules may not work because of renaming.
Renaming modules to lower case
Added comment
Rewrote this module too
Added other detector efficiencies, improved fiducial efficiency curve to not take negative values.
Updated file to new function names, added background pdf
Changed comments and variable names, corrected new function names, changed output density, opened negative signal parameter range, fixed bug in pdf construction.
Changed constant RooRealVars into RooConstantVars. Opened event range for small peak parameters. MC still with different production and fitting pdfs.
Changed construction of extended likelihood pdfs. Changed normalization of pdfs to extended number. reverted to normal MC generation and fit (same backgd+signal model) and uncommented pull statistics again.