Merge pull request #1 from ryaninhust/master

Update
Merge branch 'master' of https://github.com/ryaninhust/sampling
Merge branch 'master' of https://github.com/ryaninhust/sampling
Merge branch 'master' of https://github.com/ryaninhust/sampling
Merge branch 'master' of https://github.com/ryaninhust/sampling
[Add] add algorithm random jump, forest fire, snow ball
Merge pull request #4 from Hyiiego/master

Add algorithms