Change from OS X to macOS (#142)

* Update README.md

Update terminology to macOS.

Also rename install_osx_dependencies.sh to install_macos_dependencies.sh.

README.md

@@ -82,9 +82,9 @@ There is also a demo application:
     cd tensorflow-mnist
     stack --docker --docker-image=$IMAGE_NAME build --exec Main
 
-## Build on Mac OS X
+## Build on macOS
 
-Run the [install_osx_dependencies.sh](./tools/install_osx_dependencies.sh)
+Run the [install_macos_dependencies.sh](./tools/install_macos_dependencies.sh)
 script in the `tools/` directory. The script installs dependencies
 via [Homebrew](http://brew.sh) and then downloads and installs the TensorFlow
 library on your machine under `/usr/local`.

tools/install_macos_dependencies.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 set -eu
 
-echo "Installing OSX System Dependencies"
+echo "Installing macOS System Dependencies"
 echo "=================================="
 
 if ! type "brew" > /dev/null; then