add some more tests

[zarquin]

we need to reduce the testing of the python3 startup time
add nocurses
add a test where we test the screen refresh command
test adding inbts ass opposed to ranint
test numpy

[zarquin]

test refactoring loops:
3* adding ints per cell vs
one big loop

floats vs ints

[zarquin]

https://numba.readthedocs.io/en/stable/user/5minguide.html