Initial commit
improve identation in the code
Add Excercise 1.6
Add Exercise 1.7
move homework #1 to his own folder
Add test of hw1
Add Excercise #1.8
Add Excercise #1.9
Add Excercise #1.10
remove duplicated file
Fix Excercise #1.1

Resolve bug: when a date have the older year but a smaller month
Add Excercise #1.11
Add Excercise #1.12
Add part 2 of Excercise #1.12
Add Excercise #1.13