iterative ref: MASTER ISSUE: Implement expectation maximization iterative refinement

[geoffwoollard]

Master issue of

• [ ] https://github.com/compSPI/reconstructSPI/issues/53
• [x] https://github.com/compSPI/reconstructSPI/issues/52
• [ ] https://github.com/compSPI/reconstructSPI/issues/50
• [ ] https://github.com/compSPI/reconstructSPI/issues/42
• [ ] https://github.com/compSPI/reconstructSPI/issues/39
• [ ] https://github.com/compSPI/reconstructSPI/issues/37
• [x] https://github.com/compSPI/reconstructSPI/issues/35
• [x] https://github.com/compSPI/reconstructSPI/issues/32
• [ ] https://github.com/compSPI/reconstructSPI/issues/31
• [ ] https://github.com/compSPI/reconstructSPI/issues/30
• [ ] https://github.com/compSPI/reconstructSPI/issues/25
• [x] https://github.com/compSPI/reconstructSPI/issues/24
• [x] https://github.com/compSPI/reconstructSPI/issues/20
• [x] https://github.com/compSPI/reconstructSPI/issues/19
• [x] https://github.com/compSPI/reconstructSPI/issues/18
• [ ] https://github.com/compSPI/reconstructSPI/issues/17
• [x] https://github.com/compSPI/reconstructSPI/issues/16
• [x] https://github.com/compSPI/reconstructSPI/issues/15
• [x] https://github.com/compSPI/reconstructSPI/issues/14
• [x] https://github.com/compSPI/reconstructSPI/issues/13
• [x] https://github.com/compSPI/reconstructSPI/issues/11
• [ ] https://github.com/compSPI/reconstructSPI/issues/10
• [ ] https://github.com/compSPI/reconstructSPI/issues/6
• [ ] https://github.com/compSPI/reconstructSPI/issues/5
• [ ] https://github.com/compSPI/reconstructSPI/issues/3

Tasks live in project Implement expectation maximization iterative refinement, one github issue per task.