If you want to add more file type handled by my plugin, use this place holder automator application and modify the file named /Applications/Unique Type Identifiers.app/Contents/Info.plist.
Add a section like this at the end:
<dict>
<key>UTTypeConformsTo</key>
<array>
<string>net.samlepirate.uti.xml</string>
</array>
<key>UTTypeDescription</key>
<string>Visual Studio Project</string>
<key>UTTypeIdentifier</key>
<string>net.samlepirate.uti.vcproj</string>
<key>UTTypeTagSpecification</key>
<dict>
<key>com.apple.ostype</key>
<string>TEXT</string>
<key>public.filename-extension</key>
<array>
<string>vcproj</string>
</array>
</dict>
</dict>
before:
</array>
</dict>
</plist>
Change
UTTypeDescription value. Then change UTTypeIdentifier to a unique
identifier (use something like net.samlepirate.uti.file_extension) and
add your extension in the public.filename-extension array.
You can
let the plugin choose between a standard xml or text color syntaxing
for your file by changing the value of UTTypeConformsTo from
net.samlepirate.uti.xml to net.samlepirate.uti.text.
colorqc
Add More File Type to Quick Look