python: expose GL::Renderer::setBlendEquation(), GL::Renderer::setBlendFunction() and related enums.

[vladimirgamalyan]

No description provided.

[codecov-commenter]

Codecov Report

Merging #9 into master will increase coverage by 0.13%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master       #9      +/-   ##
==========================================
+ Coverage   90.95%   91.08%   +0.13%     
==========================================
  Files          40       40              
  Lines        4122     4005     -117     
==========================================
- Hits         3749     3648     -101     
+ Misses        373      357      -16     

Impacted Files	Coverage Δ
src/python/magnum/gl.cpp	96.01% <100.00%> (+0.29%)	⬆️
src/python/magnum/platform/application.h	68.75% <0.00%> (-23.28%)	⬇️
src/python/magnum/platform/glx.cpp	55.55% <0.00%> (-11.12%)	⬇️
src/python/magnum/magnum.cpp	100.00% <0.00%> (ø)
src/python/corrade/corrade.cpp	100.00% <0.00%> (ø)
src/python/magnum/platform/sdl2.cpp	36.95% <0.00%> (+4.22%)	⬆️
src/python/magnum/platform/glfw.cpp	35.71% <0.00%> (+5.71%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 11075a4...5409380. Read the comment docs.

[mosra]

Merged as fe559e6, thank you! In addition I also exposed the remaining overloads of those + all new features that went into shaders.Phong since last time (instancing, improved normal mapping and light support...)