Improvements

[JLaborda]

This pull request adds the features of broadcasting for issue #1 .
The broadcasting is of five types:

• NO_BROADCASTING: Ring topology execution. This is for executing the original CGES algorithm.
• BEST_BROADCASTING: In each iteration, the best result is passed as input for the rest of the processes. The best process gets the second-best process.
• RANDOM_BROADCASTING: In each iteration, the input of each process is randomly selected. We avoid self-feedback.
• ALL_BROADCASTING: In each iteration of the search loop, the results are fused into one graph and passed to all the processes. Once each process finishes, it compares its results with the fusion graph, taking the best of the two graphs.
• PAIR_BROADCASTING: In this case, the fusion process of each cges process is modified. The fusion is now a paircombination fusion, where in each cges process, each result of the previous iteration is fused with the current dag of the cges process. Then, the best graph is selected and simplified by a BES thread.

Only the top three algorithms are the ones with the best results.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.46%. Comparing base (ce18f87) to head (9e3bb57).

Additional details and impacted files

@@               Coverage Diff               @@
##             developer       #6      +/-   ##
===============================================
+ Coverage        76.32%   81.46%   +5.14%     
- Complexity         395      409      +14     
===============================================
  Files               26       26              
  Lines             1685     1662      -23     
  Branches           259      204      -55     
===============================================
+ Hits              1286     1354      +68     
+ Misses             356      259      -97     
- Partials            43       49       +6     

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[JLaborda]

Broadcasting does not work: