Add conditional hyperedge construction

[tzuhanchang]

Add conditional hyperedge construction #48. Adding the option Restriction in the dataset configuration file (db.yaml). Restriction takes the following values:

• none (No restrictions applied)
• list, for example [[0,-1,1], [0,-2,1], [1,1,1]], these integers are id defined in the Features.

Only hyperedges that satisfy one of the conditions will be used for the subsequent computing.

If id -1 represents electron, -2 represents muon, 0 represents MET, and 1 represents jet, then restriction [[0,-1,1], [0,-2,1], [1,1,1]] will prohibit non-physical cases such as a hyperedge containing two jets and one lepton.

[tzuhanchang]

@els285 can you test this on lep+jet ttbar events?

[tzuhanchang]

Complete task list:

• [ ] Test on ttbar lep+jet events
• [ ] Update CHANGELOG.md
• [ ] Update documentation