Merge pull request #60 from clarencecastillo/master

Reconstructed simulate() and revive_simulation() in dose.py
Merge pull request #61 from clarencecastillo/master

1. Fixed TypeError when calling org.status['location'] 2. Population[pop_name].generation is now equal to generation count in simulation level to cater both revive and normal simulations 3. Updated 08_revive_simulation_03.py
Merge pull request #63 from clarencecastillo/master

Restructured 'value' in line 585 of database_calls.py
Implemented logging of parent's identities through a list in simulations 03, 04 and 05's mating scheme