Fix: SCE_FTree_Build() now raises an error if the geometry cannot be generated
Fixed SCE_FTree_InitNode(): added missing stuff
FTree: fixed vertices generation for children whose angle to their parent is close to 90
FTree: restored naive texcoord generation: evolved one doesnt actually work on rotated nodes.
FTree: space colonization algorithm for generating trees
FTree: branch radius computation
FTree: ratio-conservative texcoord generation
FTree: little change on branch angle generation
FTree: reducing the number of vertices per node according to the radius
VGrid: constified parameters of some Get() functions
FTree: fixed space colonization, no longer copy overlapping memory
FTree: added GetNum{Branches,Nodes}() functions
Constified most parameters of most functions of collide module
Added (Bounding)Box_SetFromRectl() functions
FTree: serialization/deserialization
FTree: constified GetNodeMatrixv() parameter
FTree: renamed GetNodeNumChildren()
Added FTree_GetNodePositionv()
FTree: geometry simplification by node merging
FTree: ComputeRadius(): leaf node radius = 0