Fixed the micro_toy instance used for testing
Created an intermediate test instance between micro and mini
Modified the model to remove y,z,theta variables and added new constraints
Printing statistics about the instance before starting the MIP
Added detection of which segment incides on which node
Fixed a bug in data#is_main
Added more info to data#print_stats
Added exact_time constraint to the model
Fixed error in x obj coefficient
Merge branch 'x-only'