Create UML presentation

[pintergreg]

• [x] OOP overview
  • [x] previous paradigms
  • [x] 4 main concepts
  • [x] inheritance
• [x] UML
  • [x] use-case
  • [x] state
  • [x] activity
  • [x] sequence
  • [x] class
  • [x] object
  • [x] component