New directory chapter2-2

New allowance
New best_cow_line
New cleaning_shifts
New coin_problem
New fence_repair
New packets
New protecting_the_flowers
New radar_installation
New sarumans_army
New section_schedule_problem
New stall_reservations
New stripies
New yogurt_factory
Merge pull request #43 from ie-ProCon/create_chapter2-2

New directory chapter2-2