Memory cleanup, use pooling and data structs

[jthomperoo]

Part of #148

[codecov-io]

Codecov Report

Merging #178 (e97662d) into master (49fe242) will decrease coverage by 0.18%.
The diff coverage is 82.68%.

@@            Coverage Diff             @@
##           master     #178      +/-   ##
==========================================
- Coverage   79.86%   79.67%   -0.19%     
==========================================
  Files         100      103       +3     
  Lines        3476     3676     +200     
  Branches      305      316      +11     
==========================================
+ Hits         2776     2929     +153     
- Misses        450      492      +42     
- Partials      250      255       +5     

Flag	Coverage Δ
unittests	79.67% <82.68%> (-0.19%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/standard/collision/collider.ts	78.57% <0.00%> (ø)
...tandard/webgl/default_primitive_fragment_shader.ts	58.33% <0.00%> (ø)
.../standard/webgl/default_primitive_vertex_shader.ts	24.32% <0.00%> (-2.95%)	⬇️
src/standard/webgl/default_text_fragment_shader.ts	42.10% <0.00%> (ø)
.../standard/webgl/default_texture_fragment_shader.ts	42.10% <0.00%> (ø)
...rc/standard/webgl/default_texture_vertex_shader.ts	19.56% <0.00%> (-1.87%)	⬇️
src/rendering/renderable.ts	70.27% <35.71%> (+6.63%)	⬆️
src/geometry/vector.ts	89.85% <50.00%> (+0.30%)	⬆️
src/standard/interpolation/interpolation_system.ts	42.85% <50.00%> (-2.15%)	⬇️
src/standard/http_image/http_image_system.ts	65.11% <66.66%> (ø)
... and 47 more