update main TODO list

include/tangerine.h

@@ -6,21 +6,25 @@
 
 /*
 * === TODO: ===
+* - try to improve the setup interface for examples
+*   	see if we can remove some boilerplate with more helpers, or
+*   	re-organizing
+* - add orbit function to camera, see orbitPositionZ0 in example
+*   	maybe implement with quaternion, so we can set arbitrary orbit axis
+* - update camera interal state and rotations to use quaternions
 * - add scene abstrastion for RenderState
 * - add an example of dynamically switching shaders for an entity
 * - fix debug load times (either by using cgltf, or hiding tinygltf.h)
 * - RenderGroups and Entities need to come into and out of existence during
 *  		gameplay. So, we need to extend MemoryArena to be a pool allocator
 *  		instead of an allocate only linear allocator
+* - resizable arrays for entities and asset system (^ see above)
 * - add libTangerine namespace?
-* - clean up examples with new asset system
-* - merge render_group_fix branch back into master
 * - make a test case for overflowing default array sizes, rg->assets
 *	  	rg_info->groups, render_group->enitities, rg->textures
 * - test for video memory leaking since we're not actually deleting GLBuffers
 *   	anywhere
 * - look for glm::mat4 in structs, and replace with pointers (easier debugging)
-* - resizable arrays for entities and asset system
 * - defaults include for various #defines
 * - make separate shaders for per vertex, and per pixel/fragment lighting
 * 		see red book chapter 7
@@ -63,6 +67,7 @@
 *  		- remember to update offsets in initLights()
 *  - use rg_arena for store GLMeshes, see initGLMesh()
 *  - merge back into libTangerine
+* - merge render_group_fix branch back into master
 */