Initial checkin of gRPC to third_party/

third_party/grpc/INSTALL.md

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+#If you are in a hurry
+
+For language-specific installation instructions for gRPC runtime, please
+refer to these documents
+
+ * [C++](examples/cpp): Currently to install gRPC for C++, you need to build from source as described below.
+ * [C#](src/csharp): NuGet package `Grpc`
+ * [Go](https://github.com/grpc/grpc-go): `go get google.golang.org/grpc`
+ * [Java](https://github.com/grpc/grpc-java)
+ * [Node](src/node): `npm install grpc`
+ * [Objective-C](src/objective-c)
+ * [PHP](src/php): `pecl install grpc-beta`
+ * [Python](src/python/grpcio): `pip install grpcio`
+ * [Ruby](src/ruby): `gem install grpc`
+
+
+#Pre-requisites
+
+##Linux
+
+```sh
+ $ [sudo] apt-get install build-essential autoconf libtool
+```
+
+##Mac OSX
+
+For a Mac system, git is not available by default. You will first need to
+install Xcode from the Mac AppStore and then run the following command from a
+terminal:
+
+```sh
+ $ [sudo] xcode-select --install
+```
+
+##Protoc
+
+By default gRPC uses [protocol buffers](https://github.com/google/protobuf),
+you will need the `protoc` compiler to generate stub server and client code.
+
+If you compile gRPC from source, as described below, the Makefile will
+automatically try and compile the `protoc` in third_party if you cloned the
+repository recursively and it detects that you don't already have it
+installed.
+
+
+#Build from Source
+
+For developers who are interested to contribute, here is how to compile the
+gRPC C Core library.
+
+```sh
+ $ git clone https://github.com/grpc/grpc.git
+ $ cd grpc
+ $ git submodule update --init
+ $ make 
+ $ [sudo] make install
+```