ignore output folder
function was not working, fixed: from has_predessor to .has_predessor()
add time tick to method parameters
write_network_agent_step_info method to save info on each time tick
save graphs instead of showing them on each model run
write initial model state as -1 to file (before any step() is performed)
white space and more explicit print statments (instead of just printing objects)
changed seed from 1 to 5, changed ticks from 5 to 1000
bug where you can't find len() on an iterator, used the list return from predecessor instead
unused function that returns a dict of agent values to be saved.  might be useful when saving LENS states
Merge pull request #20 from chendaniely/write-time-steps-to-file

Write time steps to file