THRIFT-4186 Add travis build for Rust
Client: rs
Patch: Allen George <allen.george@gmail.com>

This closes #1260
diff --git a/lib/rs/src/server/threaded.rs b/lib/rs/src/server/threaded.rs
index a486c5a..66680b1 100644
--- a/lib/rs/src/server/threaded.rs
+++ b/lib/rs/src/server/threaded.rs
@@ -47,7 +47,8 @@
 /// use thrift::protocol::{TInputProtocolFactory, TOutputProtocolFactory};
 /// use thrift::protocol::{TBinaryInputProtocolFactory, TBinaryOutputProtocolFactory};
 /// use thrift::protocol::{TInputProtocol, TOutputProtocol};
-/// use thrift::transport::{TBufferedReadTransportFactory, TBufferedWriteTransportFactory, TReadTransportFactory, TWriteTransportFactory};
+/// use thrift::transport::{TBufferedReadTransportFactory, TBufferedWriteTransportFactory,
+///                         TReadTransportFactory, TWriteTransportFactory};
 /// use thrift::server::{TProcessor, TServer};
 ///
 /// //