Documentation #1176

Updated by pospelov about 5 years ago

* GeneticMinimizer is now moved to BornAgain
** Correct Unix installation instructions: no dependency from ROOT
** correct software Architecture: remove ROOT from picture of libBornAgainFit dependencies, but still mention it in text for solidness
** Tutorial "introduction to fitting": add Genetic to the list of minimizers

Python Examples
* Fix text of "Working with sample parameters" for line numbers