implemented csv logging to a file. see README
program only prints out current population every "PRINT_POP_SIZE_MULTIPLE".
corrected problem with how is_food_scarce() works where it was previously referencing a non-local variable rather than the input parameter.
re-worked the Human.search_for() definition again. corrected the IndexError issue due to simple order of operations mistake. this whole def is likely going to be re-written in the future since it pretty much sucks as is.
fixed some spelling mistakes and non-procedural stuff
next major commit will have to wait for the heritage mechanic to be roughed out a bit

Signed-off-by: Troy Dowling <troywdowling@gmail.com>