0.1.0a2

Implemented support for multiple PBR workflows

• Improved Material classes

  • Split Material class into multiple classes depending on the workflow
  • MaterialBase now holds the common parameters and functionalities
  • BasecolorMetallicMaterial support additional parameters for basecolor-metallic workflow
  • DiffuseSpecularMaterial support additional parameters for diffuse-specular workflow
  • Support for optional maps

• Improved loading from file

• Improved CookTorranceBRDF to handle the different workflows.