Add proof by evaluation examples
Add proof by evaluation examples

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

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