Release 0.5

• Improved error messages.
• Updated internal packages.
• Updated readme example syntax.

Release 0.4

• Added support for sampling existing images.
• Added more global GLSL functions.
• Added scalar constructors for vec2 & vec3.
• Fixed creation of output directory when it doesn't exist.

Release 0.3

• Fix support for 1D & 3D textures

Release 0.2

• fix standard image writer
• fix non-stride=4 in raw image writer

Release 0.1

Initial beta release.