[Feature] Median Cut Algorithm

[Ashwani Rathee]

Couple of things to do:

• We want this algorithm to work with current API
• Remove erroneous behaviour and have more tests
• Look for speed and memory improvements
• Write its GPU version (Could be done in later PR but let's see

[Adrian Hill]

Sounds great. If we notice the package needs some API changes along the way, that's totally ok, we're still in 0.1.0.