feat(emacs): add basic indentation support
feat(emacs): add basic indentation support

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

soonhokong/lean,rlewis1988/lean,htzh/lean,avigad/lean,c-cube/lean,avigad/lean,soonhokong/travis_test,codyroux/lean0.1,leanprover-community/lean,Kha/lean,soonhokong/travis_test,soonhokong/travis_test,fpvandoorn/lean2,soonhokong/lean,leanprover/lean,leodemoura/lean,fpvandoorn/lean,dselsam/lean,soonhokong/lean-osx,javra/lean,c-cube/lean,Kha/lean,leodemoura/lean,leanprover-community/lean,leodemoura/lean,htzh/lean,UlrikBuchholtz/lean,leanprover-community/lean,dselsam/lean,fpvandoorn/lean,soonhokong/lean-osx,htzh/lean,leanprover/lean,soonhokong/lean-windows,sp3ctum/lean,javra/lean,fgdorais/lean,eigengrau/lean,leanprover-community/lean,fgdorais/lean,digama0/lean,fpvandoorn/lean2,eigengrau/lean,avigad/lean,avigad/lean,soonhokong/lean-windows,johoelzl/lean,leanprover-community/lean,codyroux/lean0.1,fpvandoorn/lean,fpvandoorn/lean,fpvandoorn/lean,leanprover/lean,fgdorais/lean,leanprover/lean,dselsam/lean,UlrikBuchholtz/lean,avigad/lean,levnach/lean,soonhokong/lean-osx,johoelzl/lean,soonhokong/travis_test,levnach/lean,c-cube/lean,levnach/lean,eigengrau/lean,digama0/lean,Kha/lean,Kha/lean,digama0/lean,leodemoura/lean,Kha/lean,dselsam/lean,digama0/lean,fpvandoorn/lean2,soonhokong/lean,soonhokong/lean-windows,codyroux/lean0.1,rlewis1988/lean,htzh/lean,rlewis1988/lean,leodemoura/lean,sp3ctum/lean,fpvandoorn/lean2,fpvandoorn/lean2,digama0/lean,rlewis1988/lean,javra/lean,sp3ctum/lean,johoelzl/lean,levnach/lean,leanprover-community/lean,dselsam/lean,htzh/lean,rlewis1988/lean,eigengrau/lean,johoelzl/lean,fgdorais/lean,soonhokong/lean-osx,digama0/lean,c-cube/lean,javra/lean,soonhokong/lean-windows,sp3ctum/lean,avigad/lean,javra/lean,soonhokong/lean,fpvandoorn/lean,dselsam/lean,johoelzl/lean,johoelzl/lean,UlrikBuchholtz/lean,soonhokong/lean-osx,fgdorais/lean,soonhokong/lean-windows,Kha/lean,rlewis1988/lean,soonhokong/lean,UlrikBuchholtz/lean,codyroux/lean0.1,UlrikBuchholtz/lean,leanprover/lean,leodemoura/lean,c-cube/lean,fgdorais/lean,sp3ctum/lean,leanprover/lean,eigengrau/lean,levnach/lean