##TODO:
- renderer
	- check over renderer, camera, gooey init after changes
	- pass in frame time to camera movement functions to decouple speed from framerate
	- test camera speed when moving with composite vector
		- may be fixed?? need to test by examining camera position between frames and compare the distance
	- add 3d orientation widget to gooey
- make hashmap grid type
- position entities on grid hexes
- remove checks for colors, textures from render_group functions
	- actually cannot remove checks for texture because some meshes aren't loaded properly
	- maybe can cause loading mesh to fail when more than one mesh per file
- figure out bug in fragment shader when removing commented line
- move input handling out to new file, controller?
- map generation
- pathfinding
- assimp animation
- replace aixlog with custom logging iostream?
- think about combining mesh data and render_group data to save some memory
	- actually don't need to save the vertex/normal buffers after passing to opengl
- use a storage pool for assimp meshes allowing reuse across entities
	- also cache textures from loaded meshes for re-use
- replace remaining calls to malloc/free with safe(r) function in util.h

##LATER TODO:
- add initial opengl constant for INT_MAX, and checks in render_group functions
- try out YAML instead of JSON (make sure can still use schema validation)
- move from COLLADA output to glTF (GL Transmission Format) https://www.khronos.org/gltf/
- add config.js/yaml for application config (remove some defines everywhere)
- maybe try deferred rendering at some point to use a ton of lights
- add cpu perforcmace counters in render loop
- check for memory leaks w/ valgrind

##DONE:
- add palette texture colors to hexgrid
	- map palette index to UV coords for shader in hexgrid render_group
	- fill hexgrid uv buffer with coordinates
	- set use_texture to true on hexgrid render_group render_objects
	- update hgUpdateColorBuffer to change uv buffer instead of color buffer
		rename function and replace calls
	- remove current_color/stored_color from hex_info struct
		- remove uses of these in hexgame.cpp and hexgrid.cpp
	- re-arrange vertex attributes in shader and render_group to remove color_buffer
- update hgUpdateColorBuffer() to use POD instead of gl_buffer
- remove color buffer from render_group
- implement texturing to reduce the number of meshes generated by assimp from materials (currently creates a sepereate mesh per material)
	- need to do UV mapping on models, and parse UV data in shader