Add new data types in DataContainer

[aschaeffer]

New data types

In order to enable future use cases we should add these new data types in DataContainer:

• [x] vec3 (3x double, xyz, rgb)
• [x] vec4 (4x double, rgba)
• [x] byte array (textures, binary data)

Future use cases

Use Case	Data type(s)	Remarks / Examples
Entity position	vec3, vec4	Player position, camera position, particle position, ...
Entity direction	vec3, vec4	Player direction, camera direction, particle direction, ...
Vector arithmetic	vec3, vec4	Velocity transformation, gravity, ...
Colors	vec3, vec4	RGB or RGBA
Textures	byte array	Textures can be loaded from file into an attribute
Procedural Textures / Texture transformation	byte array	Procedural generation or transformation of textures

Removal

Maybe we should remove "data_float" and "data_int" for simplicity and force the use of int64 instead of int and double instead of float).

[IAmNotHanni]

For the byte array I found this topic.

[aschaeffer]

OpenGL Mathematics contains a bunch of datatypes. The most important are vec2, vec3 and vec4, but others like mat2, mat3 could be helpful, too.

#include <glm/vec2.hpp>               // vec2, bvec2, dvec2, ivec2 and uvec2
#include <glm/vec3.hpp>               // vec3, bvec3, dvec3, ivec3 and uvec3
#include <glm/vec4.hpp>               // vec4, bvec4, dvec4, ivec4 and uvec4
#include <glm/mat2x2.hpp>             // mat2, dmat2
#include <glm/mat2x3.hpp>             // mat2x3, dmat2x3
#include <glm/mat2x4.hpp>             // mat2x4, dmat2x4
#include <glm/mat3x2.hpp>             // mat3x2, dmat3x2
#include <glm/mat3x3.hpp>             // mat3, dmat3
#include <glm/mat3x4.hpp>             // mat3x4, dmat2
#include <glm/mat4x2.hpp>             // mat4x2, dmat4x2
#include <glm/mat4x3.hpp>             // mat4x3, dmat4x3
#include <glm/mat4x4.hpp>             // mat4, dmat4

[Fohlen]

Added basic vector types in 4e9e3d8c6d6a8d3006cfd281f5753dca8d6c5109

[Fohlen]

This will be solved by #86