Added model object NQueens that solves N Queen Puzzle.
Added view template nqueens.scala.html and route /nqueens which display one solution for 8 Queens Problem.
Added function nqueens in controller Application that handle /nqueens request and return one random solution for 8 Queens Puzzle.
Merge pull request #7 from mkaim/web

URBNG-666: Added "N Queen Problem" solver