Documentation Updates for 6.0 (#2815)

* Documentation Updates for 6.0

LinuxGPU.md

@@ -1,8 +1,6 @@
 Turi Create **does not require a GPU**, but certain models can be accelerated by the use of a GPU. 
-To enable GPU support in linux after installation of the `turicreate` package, please perform the following steps:
-
- * Install CUDA 8.0 ([instructions](http://docs.nvidia.com/cuda/cuda-installation-guide-linux/))
- * Install cuDNN 5 for CUDA 8.0 ([instructions](https://developer.nvidia.com/cudnn))
+To enable GPU support in Linux after installation of the `turicreate` package, first make sure both
+[CUDA](http://docs.nvidia.com/cuda/cuda-installation-guide-linux/) and [cuDNN](https://developer.nvidia.com/cudnn) are installed.
 
 Make sure to add the CUDA library path to your `LD_LIBRARY_PATH` environment
 variable.  In the typical case, this means adding the following line to your
@@ -11,18 +9,18 @@ variable.  In the typical case, this means adding the following line to your
 ```shell
 export LD_LIBRARY_PATH=/usr/local/cuda/lib64:$LD_LIBRARY_PATH
 ```
-
 If you installed the cuDNN files into a separate directory, make sure to
-separately add it as well. Next step is to uninstall `mxnet` and install the
-CUDA-enabled `mxnet-cu80` package:
+separately add those as well.
+
+The next step is to uninstall `tensorflow` and install the
+CUDA-enabled `tensorflow-gpu` package:
 
 ```
-(venv) pip uninstall -y mxnet
-(venv) pip install mxnet-cu80==1.1.0
+(venv) pip uninstall -y tensorflow
+(venv) pip install tensorflow-gpu
 ```
 
-Make sure you install the same version of MXNet as the one `turicreate` recommends
-(currently `1.1.0`). If you have trouble setting up the GPU, the [MXNet
-installation instructions](https://mxnet.apache.org/get_started/?version=v1.1.0&platform=linux&language=python&environ=pip&processor=gpu) may
+If you have trouble setting up the GPU, the [TensorFlow
+installation instructions](https://www.tensorflow.org/install/gpu) may
 offer additional help.
 

README.md

@@ -118,20 +118,6 @@ To install `Turi Create` within your virtual environment:
 (venv) pip install -U turicreate
 ```
 
-Version 5.0 (New)
------------------
-
-Turi Create 5.0 includes:
-* GPU Acceleration on Macs for:
-  * Image Classification (macOS 10.13+)
-  * Image Similarity (macOS 10.13+)
-  * Object Detection (macOS 10.14+)
-  * Activity Classification (macOS 10.14+)
-* New Task: Style Transfer
-* Recommender model deployment
-* Vision Feature Print model deployment
-
-
 Documentation
 -------------