Update to protobuf 2.0, regenerate files

Cargo.toml

@@ -21,7 +21,7 @@ default = ["system-libz"]
 system-libz = ["flate2"]
 
 [dependencies]
-protobuf = "=1.6"
+protobuf = "2.0"
 byteorder = "1.1"
 flate2 = { version = "1.0", optional = true }
 inflate = "0.4"

src/proto/fileformat.rs

@@ -1,4 +1,4 @@
-// This file is generated by rust-protobuf 1.6.0. Do not edit
+// This file is generated by rust-protobuf 2.0.0. Do not edit
 // @generated
 
 // https://github.com/Manishearth/rust-clippy/issues/702

src/proto/osmformat.rs

@@ -1,4 +1,4 @@
-// This file is generated by rust-protobuf 1.6.0. Do not edit
+// This file is generated by rust-protobuf 2.0.0. Do not edit
 // @generated
 
 // https://github.com/Manishearth/rust-clippy/issues/702