Update QuickStart README.md install

- ensure installation links this branches version of the install instructions
- update docs to account for any language-specific install changes

examples/ruby/README.md

@@ -3,7 +3,7 @@ gRPC in 3 minutes (Ruby)
 
 BACKGROUND
 -------------
-For this sample, we've already generated the server and client stubs from [helloworld.proto][]
+For this sample, we've already generated the server and client stubs from [../protos/helloworld.proto][]
 
 PREREQUISITES
 -------------
@@ -25,8 +25,8 @@ RVM is also useful if you don't have the necessary privileges to update your sys
 
 INSTALL
 -------
+- [Install gRPC Ruby][]
 
-- Clone this repository
 - Use bundler to install the example package's dependencies
 
   ```sh
@@ -59,3 +59,4 @@ You can find a more detailed tutorial in [gRPC Basics: Ruby](route_guide/README.
 
 [helloworld.proto]:../protos/helloworld.proto
 [RVM]:https://www.rvm.io/
+[Install gRPC ruby]:../../src/ruby#installation