bug #169 Updated Windows install command so it is compatible with PowerShell (futurevision)

This PR was merged into the 1.0-dev branch.

Discussion
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Updated Windows install command so it is compatible with PowerShell

This should fix the garbage output in PowerShell on Windows.

Commits
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557eaba - Updated Windows install command so it is compatible with PowerShell

Author: javiereguiluz

README.md

@@ -19,7 +19,7 @@ $ sudo chmod a+x /usr/local/bin/symfony
 ### Windows
 
 ```bash
-c:\> php -r "readfile('http://symfony.com/installer');" > symfony
+c:\> php -r "file_put_contents('symfony', file_get_contents('http://symfony.com/installer'));"
 ```
 
 Move the downloaded `symfony` file to your projects directory and execute