Pre-release v0.2 (alpha)

Changes:

• Replaced convert_linear_to_srgb() function with convert_to_type() (which can convert to sRGB and to a specific output format)
• Python wrapper: generate_mips() now outputs the input dtype by default (instead of float)

Additions:

• Added code documentation for core functions
• Added cmake and Linux build support (Mac might work as well)
• Added Linux binary to Python wrapper
• Added DLL exports for the C++ functions (previously only C-style functions were exported)