godeps: update leveldb and snappy, dump serpent-go

Godeps/Godeps.json

.../_workspace/src/github.com/ethereum/serpent-go/.gitignore

..._workspace/src/github.com/ethereum/serpent-go/.gitmodules

...s/_workspace/src/github.com/ethereum/serpent-go/README.md

Godeps/_workspace/src/github.com/ethereum/serpent-go/all.cpp

..._workspace/src/github.com/ethereum/serpent-go/cpp/api.cpp

...s/_workspace/src/github.com/ethereum/serpent-go/cpp/api.h

.../_workspace/src/github.com/ethereum/serpent-go/serpent.go

...ace/src/github.com/ethereum/serpent-go/serpent/.gitignore

...ce/src/github.com/ethereum/serpent-go/serpent/MANIFEST.in

...space/src/github.com/ethereum/serpent-go/serpent/Makefile

...pace/src/github.com/ethereum/serpent-go/serpent/README.md

...ace/src/github.com/ethereum/serpent-go/serpent/bignum.cpp

...space/src/github.com/ethereum/serpent-go/serpent/bignum.h

...ce/src/github.com/ethereum/serpent-go/serpent/cmdline.cpp

...e/src/github.com/ethereum/serpent-go/serpent/compiler.cpp

...ace/src/github.com/ethereum/serpent-go/serpent/compiler.h

...ce/src/github.com/ethereum/serpent-go/serpent/example.cpp

...ithub.com/ethereum/serpent-go/serpent/examples/collatz.se

.../serpent-go/serpent/examples/counterparty/counterparty.se