add brew installation and real check docker client version

README.md

@@ -24,6 +24,29 @@ or curl:
         curl https://raw.githubusercontent.com/noplay/docker-osx/HEAD/docker-osx > /usr/local/bin/docker-osx
         chmod +x /usr/local/bin/docker-osx
 
+or brew:
+        brew create curl https://raw.githubusercontent.com/noplay/docker-osx/HEAD/docker-osx --set-name docker-osx
+
+```ruby
+require "formula"
+
+class DockerOsx < Formula
+  homepage "https://github.com/noplay/docker-osx.git"
+  url "https://raw.githubusercontent.com/noplay/docker-osx/HEAD/docker-osx"
+
+  depends_on "docker"
+
+  def install
+    bin.install "docker-osx"
+  end
+
+  test do
+    system "docker-osx"
+  end
+end
+```
+
+        brew install docker-osx               
 3. Run:
 
         docker-osx shell

docker-osx

@@ -108,9 +108,9 @@ function start_vm() {
 
 # Determine currently installed version of Docker
 INSTALLED_DOCKER_VERSION=""
-if [ -f "$VAGRANT_CWD/.docker-version" ]
+if [ -f "$DOCKER_BIN" ]
 then
-  INSTALLED_DOCKER_VERSION=`cat "$VAGRANT_CWD/.docker-version"`
+  INSTALLED_DOCKER_VERSION=`$DOCKER_BIN -v | grep -oE "[0-9]+\.[0-9]+\.[0-9]"`
 fi
 
 # Check that dependencies are installed
@@ -176,7 +176,7 @@ fi
 
 
 # Set current installed Docker version
-echo $DOCKER_VERSION > $VAGRANT_CWD/.docker-version
+#echo $DOCKER_VERSION > $VAGRANT_CWD/.docker-version
 
 case "$1" in
   up|start)