Support nested repositories

[aeschli]

https://raw.githubusercontent.com/textmate/markdown.tmbundle/master/Syntaxes/Markdown.tmLanguage uses includes that refer to nested repositories:

<key>patterns</key>
    <array>
        <dict>
            <key>include</key>
            <string>#block</string>
        </dict>
    </array>
    <key>repository</key>
    <dict>
        <key>block</key>
        <dict>
            <key>patterns</key>
            <array>
                ….
                <dict>
                    <key>include</key>
                    <string>#blockquote </string>
                </dict>
                ….
            </array>
            <key>repository</key>
            <dict>
                <key>blockquote</key>
                <dict>
                …

The problem is likely on line 667

          return new IncludeOnlyRule(… , desc.repository || repository)); 

or maybe merging the two repositories?