Integrate lane detection using OpenCV

[zugaldia]

Inspired by the approaches presented on https://github.com/udacity/CarND-LaneLines-P1.

To verify functionality is similar, the same test images are being used.

[zugaldia]

Basic lane detection up and running. There're many things that can be optimized here, but this is PR gives enough tools to start analyzing images:

• We could clip/mask the image to just analyze the road
• Parameters need to be optimized
• We should do a regression for lane detection
• Such regressions should happen over a few frames

For now, we have support for grayscale conversion:

Gaussian blur:

Canny:

Line drawing:

Hough: