Updated timelines

Post Confederation
Development of the Periodic table
Geschiedenis T2
historia de la informatica
Exploitation minière à Rosia Montana
The English Reformation
La filosofía de la educación
Spanish -American War timeline
jeff's life
lara's life
Threads Evolution
The War of 1812 By: Jesse Page and Ashlie Wright
Línea de vida
Great Mathematicians
Music
citizen ship to puerto ricans