Random seeding

[rrseelam]

Implemented random seeding:

• Each class involving randomness takes a random_seed parameter
• By default, random_seed is set to 0. In this case, no seeding occurs

[dipplestix]

Sorry for the delay, please tag me as a reviewer in the future.

For the seed, please default to None instead of 0 as the default parameter and get rid of the if statements

[rrseelam]

Changed the default seed to be None. torch didn't accept None as an input, so I used a value sampled from random instead.