Capitalized beginning of line messages, added periods

cmd/ipfs/init.go

core/commands/add.go

core/commands/block.go

core/commands/bootstrap.go

core/commands/cat.go

core/commands/config.go

core/commands/dht.go

core/commands/diag.go

core/commands/dns.go

core/commands/external.go

core/commands/files/files.go

core/commands/get.go

core/commands/id.go

core/commands/ipns.go

core/commands/log.go

core/commands/ls.go

core/commands/mount_unix.go

core/commands/object/object.go

core/commands/object/patch.go

core/commands/pin.go