title: Custom build system for QML in Sublime Text 3
body: <p>I have created a build system for QML in sublime, so selecting that build system and doing a ctrl+B builds the qml code for me. But every time I switch between different type files (eg. a .py file and .qml file) I have to change the build system from QML to Automatic and vice versa. What can I do so that sublime automatically recognizes a .qml file and selects the appropriate build-system when Automatic is selected? (which for my .qml files should be the QML.sublime-build that I created)</p>
  
  <p>Here is my build system for qml:
  (in the file "QML.sublime-build")</p>
  
  <pre><code>{
      "shell_cmd": "qmlscene.exe $file_name"
  }
  </code></pre>