feat(util): add (functional) name_map
feat(util): add (functional) name_map

Signed-off-by: Leonardo de Moura <7610bae85f2b530654cc716772f1fe653373e892@microsoft.com>

UlrikBuchholtz/lean,soonhokong/lean-windows,fpvandoorn/lean,leanprover-community/lean,avigad/lean,htzh/lean,javra/lean,dselsam/lean,Kha/lean,c-cube/lean,soonhokong/lean,Kha/lean,htzh/lean,johoelzl/lean,leodemoura/lean,digama0/lean,dselsam/lean,javra/lean,soonhokong/lean-windows,dselsam/lean,fgdorais/lean,UlrikBuchholtz/lean,eigengrau/lean,soonhokong/lean,leanprover/lean,avigad/lean,c-cube/lean,Kha/lean,fgdorais/lean,johoelzl/lean,johoelzl/lean,rlewis1988/lean,Kha/lean,soonhokong/travis_test,fgdorais/lean,soonhokong/lean-osx,fpvandoorn/lean,javra/lean,fpvandoorn/lean2,soonhokong/lean-windows,soonhokong/lean-osx,fgdorais/lean,sp3ctum/lean,soonhokong/lean,johoelzl/lean,soonhokong/travis_test,leodemoura/lean,digama0/lean,fpvandoorn/lean2,sp3ctum/lean,leodemoura/lean,leanprover/lean,rlewis1988/lean,dselsam/lean,rlewis1988/lean,UlrikBuchholtz/lean,levnach/lean,leanprover-community/lean,leodemoura/lean,leodemoura/lean,htzh/lean,dselsam/lean,sp3ctum/lean,eigengrau/lean,johoelzl/lean,fpvandoorn/lean,fpvandoorn/lean2,leanprover/lean,eigengrau/lean,eigengrau/lean,levnach/lean,leanprover-community/lean,Kha/lean,sp3ctum/lean,soonhokong/lean,fgdorais/lean,sp3ctum/lean,fgdorais/lean,soonhokong/lean-osx,UlrikBuchholtz/lean,Kha/lean,leanprover-community/lean,avigad/lean,rlewis1988/lean,levnach/lean,leanprover/lean,avigad/lean,johoelzl/lean,leanprover-community/lean,soonhokong/travis_test,htzh/lean,digama0/lean,fpvandoorn/lean,levnach/lean,javra/lean,soonhokong/lean-osx,fpvandoorn/lean2,fpvandoorn/lean,leanprover/lean,soonhokong/travis_test,javra/lean,UlrikBuchholtz/lean,c-cube/lean,digama0/lean,fpvandoorn/lean2,leanprover/lean,digama0/lean,soonhokong/lean-osx,digama0/lean,soonhokong/lean-windows,c-cube/lean,levnach/lean,avigad/lean,fpvandoorn/lean,c-cube/lean,soonhokong/lean-windows,dselsam/lean,leodemoura/lean,rlewis1988/lean,avigad/lean,eigengrau/lean,leanprover-community/lean,htzh/lean,soonhokong/lean,rlewis1988/lean