* smaller changes on tcc bridge

* improved TCC interface

* added tcc module and test

* added tinycc recipe

* fixed `bitmap` imports

* updated dependencies to use eo

* fixes for recent changes to module environments in scopes

* updates for project mode

* more project support

* scopes project support

* initial support for occlusion culling

HZB rendering

* quads

* spread terrain meshing over multiple frames

* fixed triangle normals

* VVF: fixed smooth normals

* improved LOD skirts

* first VVF implementation

* fixed error in normal packing routine (sign function must not include zero)
* fixed inf in feature vertex computation

* test planet