Added Collections Workshop
Added collections workshop archive
Deleted old link to workshop archive.
Commited version 2 of collections-workshop.
Modified workshop document.
Added Day 1 Presentation (Tuples, List, Set).
Fixed minor bug from the workshop project.
Added Day 2 workshop
Fixed workshop test bug.
Merge branch 'master' of https://github.com/ZeroToHero-2014/Java into Craiu-Ovidiu
Merge branch 'Craiu-Ovidiu' of https://github.com/ZeroToHero-2014/Java into Craiu-Ovidiu
Workshop Collection 2