…d commits)

Squashed commits:
[b149f03] editied comment on test
[0cac882] unit test for set_random_state, deepcopy for the seed, updated docs
[8c056bd] adding to changelog
[ac702f3] adding reset stuff and adjusting tutorial
[932b7a6] edited docs, minor alteration to _check_random_state
[15086e9] make subheading for seed in tutorial
[323de90] small docs edit
[0b0d62b] updating docs
[6b7d7f3] merged master and passing tests for seeding
[aee24f9] removing duplicates in choose
[ede4e9f] adding warning, removing duplicates
[bfa2a5a] whoops, left a random!
[6ee5a1f] updated test case
[e0e51b4] addressed naming and got rid of TODOs
[c407807] updating gitignore to not keep .DS_Store on mac
[519307c] editing to make merge easier
[0a1c3cf] editing a bit of style
[552bf79] added and passed tests for seeding - works!
[622b969] implemented seeding, passes current test cases but not new ones yet