Make CLI wallet return 0 when exiting normally
Make CLI wallet return 0 when exiting normally

bitshares/bitshares-2,pmconrad/graphene,bitsuperlab/cpp-play2,bitshares/bitshares-2,oxarbitrage/bitshares-core,bigoc/openchain,abitmore/bitshares-2,pmconrad/graphene,abitmore/bitshares-2,bigoc/openchain,bitsuperlab/cpp-play2,abitmore/bitshares-2,bitsuperlab/cpp-play2,oxarbitrage/bitshares-core,cryptonomex/graphene,bigoc/openchain,cryptonomex/graphene,pmconrad/graphene,oxarbitrage/bitshares-core,pmconrad/graphene,bigoc/openchain,peertracksinc/muse,peertracksinc/muse,peertracksinc/muse,peertracksinc/muse,bitshares/bitshares-2,bitshares/bitshares-2,abitmore/bitshares-2,cryptonomex/graphene,oxarbitrage/bitshares-core