Merge pull request tensorflow#105 from tensorflow/update_installation

Updating installation instructions to point to latest builds and the required dependencies.

Installation.md

@@ -10,11 +10,11 @@ To install Swift for TensorFlow, download one of the packages below and follow t
 
 Packages will be released nightly after automated building is set up.
 
-| Download | Date [(last commit)](https://github.com/apple/swift/commit/280486afdc0c940af345c614a80826fcc8326abc) |
+| Download | Date |
 |----------|------|
 | [Xcode 10](https://storage.googleapis.com/swift-tensorflow/mac/swift-tensorflow-DEVELOPMENT-2019-01-04-a-osx.pkg) | January 04, 2019 |
-| [Ubuntu 16.04](https://storage.googleapis.com/swift-tensorflow/ubuntu16.04/swift-tensorflow-DEVELOPMENT-2019-01-04-a-ubuntu16.04.tar.gz) | January 04, 2019 |
-
+| [ubuntu 18.04 (Cuda 10.0)](https://storage.googleapis.com/s4tf-kokoro-artifact-testing/latest/swift-tensorflow-DEVELOPMENT-cuda10.0-cudnn7-ubuntu18.04.tar.gz) | Nightly Build |
+| [ubuntu 18.04 (Cuda 9.2)](https://storage.googleapis.com/s4tf-kokoro-artifact-testing/latest/swift-tensorflow-DEVELOPMENT-cuda9.2-cudnn7-ubuntu18.04.tar.gz) | Nightly Build |
 <details>
   <summary>Older Packages</summary>
 
@@ -64,6 +64,7 @@ Xcode 10 is required.
 
 | Download |
 |----------|
+| [January 04, 2019](https://storage.googleapis.com/swift-tensorflow/ubuntu16.04/swift-tensorflow-DEVELOPMENT-2019-01-04-a-ubuntu16.04.tar.gz) |
 | [December 04, 2018](https://storage.googleapis.com/swift-tensorflow/ubuntu16.04/swift-tensorflow-DEVELOPMENT-2018-12-04-a-ubuntu16.04.tar.gz) |
 | [November 21, 2018](https://storage.googleapis.com/swift-tensorflow/ubuntu16.04/swift-tensorflow-DEVELOPMENT-2018-11-21-a-ubuntu16.04.tar.gz) |
 | [October 17, 2018](https://storage.googleapis.com/swift-tensorflow/ubuntu16.04/swift-tensorflow-DEVELOPMENT-2018-10-17-a-ubuntu16.04.tar.gz) |
@@ -156,19 +157,27 @@ Note that nothing prevents Swift from being ported to other Linux distributions
 
 ### Requirements
 
-* Ubuntu 14.04 or 16.04 (64-bit)
+* Ubuntu 18.04 (64-bit)
 
 ### Supported Target Platforms
 
-* Ubuntu 14.04 or 16.04 (64-bit)
+* Ubuntu 18.04 (64-bit)
+
+### Additional Requirements
+
+* For GPU toolchains:
+  * CUDA Toolkit 9.2 or 10.0 
+  * CuDNN 7.1
+  * An NVIDIA GPU with compute compatibility 3.5, 6.1 or 7.0
 
 ### Installation
 
 1. Install required dependencies:
 
 ```
-$ sudo apt-get install clang libcurl3 libicu-dev libpython-dev libncurses5-dev libxml2
+$ sudo apt-get install clang libpython-dev libblocksruntime-dev
 ```
+(**Note:** You _may_ also need to install other [dependencies](https://github.com/apple/swift#linux), if you are unable to run `swift` or other tools below.)
 
 2. Download the latest binary release above.