Merge pull request #5 from adrian-bobev/master

Add css file for exercise 2
JavaScript 1 presentation fix
JavaScript II BETA presentation added
some materials added and calculator for saturday workshop
Update Person-inheritance.js
Update person.js
Merge pull request #7 from adrian-bobev/patch-2

Update person.js
Merge pull request #6 from adrian-bobev/patch-1

Update Person-inheritance.js
Add jQuery exercise