A3DGE Code

+ Added tool 3DIT, but needs some testing.
* Some documentation fixes.

Release 1.0

+ Added PLG format description.
+ Added documentation about AABB collisions.
* Changed the name of internal collision functions to something more
descriptive.
* TGameState clean keyboard when entering now.
* Octree checks object radius before check if they're inside a node.

* Fixed examples removing "fWorld" element and changing other issues.
* Collision function "BoxSphere" reimplemented with a better approximation.
* Fixed "TA3DGEApplication.ShowError": It deactivates OpenGL context now.
* Collision notifications use "TNotifyObject3DEvent" now.

+ Added documentation about the basics of collision checking.
- Removed global variable "TheWorld".
+ Added property "World3D" to "TA3DGEApplication" class.
* "TWorld3D" creates a default camera now.
+ Added methods "CheckSphereCollision" and "CheckSphereCollisionWithTags" to
"TWorld3D".
* "TWorld3D.InsertObject" reimplemented. I'm not sure if it is faster (I think
it is) but it is cleaner now and fixes some problems adding objects in octree
node edges.
* Fixed "TObject3D.SetPosition": It doesn't break if object isn't inside the
"World".

+ Added EModelLoad class to be used by model loaders.
* Fixed Application object destruction in unit a3dge.
+ Added routine to map texture on box.
* Fixed Wavefront .obj loader loading vertices with more than 3 components and
also the materials path that failed on some cases.
* Aded TOctreeNode.GetChild method.
* Method CheckCollisions moved from TOctree to TWorld3D.
* Fixed frustrum definition when creating camera. Projection is more accurate
now.
* Fixed camera initialization sample on documentation.

* Step back on the Billboard/Sprite situation: Now there's only TBillboard
with a property that changes how it's rendered (as billoboard or as sprite).

* Differentiated "billboard" from "Sprite 3D", adding a planar model to simplify.
* Documentation fixes and updates.
* Octree "Childs" renamed to "Children".

+ Added unit a3dge.Collisions that implements routines used to check collisions
between objects.

* TOctree.CheckCollisions checks object radius and ignores if it's zero or less.
+ Added a few explanations in the examples headers and a few more aestetic
changes..
+ Added example ex_collision.