Add LUniv
Merge branch 'master' into develop

* master:
  Add Christoph's THF formalization
Merge branch 'master' into develop

* master:
  Remove GoedelGod from master branch
Add GoedelGod
Merge branch 'master' into develop

* master:
  Describe branching policy
Add RPILU and NonIdempotency drafts
Remove some LUniv files
Add coq formalization of theorem 1.
Remove unnecessary import
Continue formalization up to theorem 3
Formalize the main theorems
Improve the formalization in Coq
Fix Goedel's name
Rename necessitation properly
Add CEResVariants and ComparingCERes
Write introduction draft
Write section about redundancy
Add auxiliary files produced by make to gitignore
Write inference permutation example and swapped normalization rules
Add reviews from Tableaux.