Updated timelines

Portugal's involvement in Africa
Поколения ЭВМ
Canadias Confermation
Evolución del concepto de Desarrollo Sustentable
Kelley Curtiss Stripes
American Revolution Timeline
Social Studies Test #1
Pre-Civil War
Labor Movement
Bruce's timeline
The Birth of a Nation
Conflictos Mundiales Luis
Khmer Timeline
Khmer Empire
Hawaiian Monarchy
EVOLUCION DEL CONCEPTO DE DESARROLLO SUSTENTABLE