Use debugger and byebug
Unify duplicate entries in Gemfile
Remove the dependency on backports gem
autotest: Gemfile.lock invokes all tests
Bundle update
Skelton of Monte Carlo molecular integral evaluator
Pending specs for Monte Carlo integrator
Implement gaussian_rand2
Pending Specs for MC#overlap_integral
Implement MC#overlap_integral
Factor out MC#integrate
Implement MC#kinetic_integral