vendor dependencies with godep

dependencies are vendored into Godeps/_workspace and commit versions are
recorded in Godeps.json

update datastore to e89f0511
update go.crypto
Merge pull request #35 from perfmode/godep

vendor dependencies using Godep
some more tweaks to the daemon code
Merge branch 'master' of github.com:jbenet/go-ipfs

Conflicts:
	cmd/ipfs/add.go
	cmd/ipfs/cat.go
	cmd/ipfs/ls.go
	cmd/ipfs/mount_unix.go