improved python shebangs and fixed broken handling of working directories when running programs
improved python shebangs and fixed broken handling of working directories when running programs

Kattis/problemtools,ghamerly/problemtools,ghamerly/problemtools,ghamerly/problemtools,godmar/problemtools,jsannemo/problemtools,jbransen/problemtools,jsannemo/problemtools,jsannemo/problemtools,godmar/problemtools,jbransen/problemtools,Kattis/problemtools,ghamerly/problemtools,Tarrasch/problemtools,Kattis/problemtools,Tarrasch/problemtools,jbransen/problemtools,godmar/problemtools,jsannemo/problemtools,Kattis/problemtools,jbransen/problemtools,godmar/problemtools