Player model and collection.
Players view
Render a player view for each player
A player can gain and lose points.

The rules of the game for overflowing 50 points are implemented.
Player active status is indicated by an HTML class.
classList.toggle
Fixed template directory name for livereload.
Initialize App.Vent before players collection.

Players collection needs app-wide events.
Controls view for switching to next player
The collection can switch turns.
Merge branch 'feature/player-mvc' into develop

* feature/player-mvc:
  The collection can switch turns.
  Controls view for switching to next player
  Initialize App.Vent before players collection.
  Fixed template directory name for livereload.
  classList.toggle
  Player active status is indicated by an HTML class.
  A player can gain and lose points.
  Render a player view for each player
  Players view
  Player model and collection.