Removed obsolete cpp files from dev branch.

Can be found in cpp branch for possible later development.
Removed some superflous error if-tests and taking of dm from commandline.
Added variable dm with help from Paulmag
Start logspace at smaller number for smaller dm in beginning.
dm now also printed as column in file.
Corrected some parantheses in wrong place for pretty print.
Corrected HUGE error in compounds where nearly all cores had the mass of He3.
Corrected ratios for Be7 and Li7.
Lower ratios for Z.
Added plotter script.
Plotter works, at least its something.
Added if test for the Be7 + e- reaction not impleded by electrostatic barrier.
FORGOT MINUS IN RHS T.
Integration stops if something is zero, unphysical.
Integration now returns filename of saved file.
Return should only happen one place when does the same thing.
Short script for plotting directly after integrating.
Ignored plots folder and DS_Store files.
Plotter now saves plots with good filenames to plotting folder.
Can now choose from commandline whether or not plots are to be shown (not saved).