Implemented a new way to calculate the ion source term. The solver for the volterra equation is much simpeler now.
added a simpson Rule for integration. This makes the code a hole lot slower and the NPR is almost a factor 2 lower. Do not know the concequenses.
changed which data is printed to files.

TODO: make this more confiniant. So I do not have to commit every change.
updated the matlab file so now the on and off switching of specific plots is much easier.
started working on the upgrade of the other two integration functions that are implementend. The upgrade is from ... methode to the Adaptive Simpsons rule.

However I came stuck on the facked that probably integrate function 2 and 3 are wrongly used or that the comments are wrong.
updated the integration function for the survival function to adaptive Simpson's rule.
Started with adding a function that reads out the parameters from an file.
did some more work on reading in the parameters from the file. However the code want to do not something what I do not understand
finally got Reading the first two values in working. It's not going as I like but it works
The input file reader read now 5 values out of the input file.
implemented that the printing out to file is controled on one place in the constants c file.
enviroment
Merge branch 'Simpson's_rule_integration'