Changed the api code: removed all the functions that did a slightly different thing. put them into 1 function that has several options. Moreover, cleaned up code, test functions, and other functions throughout code

updated grid code to be more clean, and have dedicated setup and cleanup functionalities. hopefully code will stay cleaner

added general run_system api binding, which will eventually replace the individual ones. this function runs a system, and depending on the input it will use a custom logging, a preloaded store, write log to file etc. I think it will be better to just write some if statements in a single function, and not have too many repeating code

Rewrote argument handling of population class, added export functions. Added python-c-bindings to return store and other small changes