[Port] Have added Wilson's algorithm and loop erased random walks

[etiennedeg]

this is a port of #1576

[codecov[bot]]

Codecov Report

Merging #24 (e3b67ed) into master (6ab2160) will decrease coverage by 0.01%. The diff coverage is 97.91%.

@@            Coverage Diff             @@
##           master      #24      +/-   ##
==========================================
- Coverage   99.45%   99.44%   -0.02%     
==========================================
  Files         106      107       +1     
  Lines        5554     5602      +48     
==========================================
+ Hits         5524     5571      +47     
- Misses         30       31       +1     

[jpfairbanks]

@nassarhuda, are you familiar with Wilson's algorithm? Could you take a look here?

[simonschoelly]

@etiennedeg @gjh6 I think this is something useful to have. Given that this PR has been lying dormant for quite a while, there might be some things that you would do differently? Then maybe it is better, if you would refactor this before me or someone else continues with reviewing.