Huge initial comit

  classic MVC architecture using the listener paradigm
  ability to place points
  ability to execute some algorithms :
    triangulation of a monotonous polygon
    triangulation of a simple polygon
    convex hull of a simple polygon
    voronoi diagram of one, two or three points only (TODO : n points)
clean project
  remove Test.java and trig_karim package
  format code (mostly convert tab to spaces)
update voronoi algorithm

  connect divergent edges to each other
  connect infinite edges to themselves
  refactor vert into origin in Edge
add function to handle N points for voronoi, TOTO : merge
add button and empty method to compute convex hull by divide and conquer
add list of points in the result of convex hull algos
add implementation of subList() method in CircularList
add orientation() method analog to crossProduct()
add convex hull algorithm using divide and conquer method
add lasts upper and lower tangent to hull result
add list of cells in half edge data structure and update voronoi
fix finding of lower and upper bound in a Line
add computation of the intersection of two segments

also format nicely isInRectangle() method
update some data structures

  remove VorEdge to keep just Edge in VoronoiDiagram
  add toString() and getSegment() and some setters in Edge data struct
  add lastDivideLine in VoronoiDiagram for backtracking
  refactor findLower/UpperBound() in Voronoi algorithm
add : handle n points in compuatation of vor, works w/ 4, some bugs remains

  when two sites have the same x in handle2Points(), line is in the wrong dir
  fail merging when intersection between left and right cell bound are equals
fix direction of line when 2 sites have the same x in handle2Points() but...

merge still fail when the intersection of right and left cell bound are equal
add TODO note on how to fix previously mentioned bug

now i'm going to bed...
handle when both intersection with l and r cells are equals
use equals instead of isInRange to compare points and show div
fix update of planar map when merging voronoi