Add Geometries (replaces Quads).

A Geometry is a collection of vertices describing a non self-intersecting
(simple) polygon. In addition to screen coordinates, the vertices have
attributes for texture coordinates (s,t) and color (r,g,b,a).

It can be used as a quad, to display distorted images, or anything in between.

Added:
^^^^^^

-- geometry from table, where table has the format:
-- info = {
-- {x,y, s,t, [r = 255, g = 255, b = 255, a = 255]}
-- {x,y, s,t, [r = 255, g = 255, b = 255, a = 255]}
-- ...
-- }
geom = love.graphics.newGeometry(info)

-- convenience wrapper for quads (same as before)
geom = love.graphics.newQuad(x,y, w,h, sw,sh)

-- retrieve vertex i (1-indexed)
x,y,s,t,r,g,b,a = geom:getVertex(i)

-- set vertex i (1-indexed)
geom:setVertex(i, x,y, s,t, [r,g,b,a])

-- flip geometry
geom:flip(x, y)


Renamed:
^^^^^^^^

love.graphics.drawq() -> love.graphics.drawg()


Removed:
^^^^^^^^

quad:setViewport()
quad:getViewport()

src/modules/graphics/opengl/Graphics.h

@@ -39,7 +39,7 @@
 
 #include "Font.h"
 #include "Image.h"
-#include "Quad.h"
+#include "graphics/Geometry.h"
 #include "SpriteBatch.h"
 #include "ParticleSystem.h"
 #include "Canvas.h"
@@ -287,9 +287,14 @@ public:
 	Image *newImage(love::image::CompressedData *cdata);
 
 	/**
-	 * Creates a Quad object.
+	 * Creates a Geometry object.
 	 **/
-	Quad *newQuad(float x, float y, float w, float h, float sw, float sh);
+	Geometry *newGeometry(const std::vector<vertex> &vertices);
+
+	/**
+	 * Creates a quadliteral Geometry object.
+	 **/
+	Geometry *newQuad(float x, float y, float w, float h, float sw, float sh);
 
 	/**
 	 * Creates a Font object.