update go-ipfs-config to version 0.2.5

cmd/ipfs/init.go

cmd/ipfs/main.go

cmd/ipfswatch/main.go

commands/request.go

core/bootstrap.go

core/bootstrap_test.go

core/builder.go

core/commands/bootstrap.go

core/commands/cmdenv/env.go

core/commands/config.go

core/commands/mount_unix.go

core/commands/repo.go

core/commands/swarm.go

core/core.go

core/core_test.go

core/coreapi/unixfs_test.go

core/corehttp/commands.go

core/corehttp/gateway_test.go

core/coreunix/add_test.go

core/mock/mock.go