Can not work well with GutterColor

[greengerong]

I like brogrammer=theme, but I also think GutterColor is very useful. So can we think about include GutterColor config?

       <dict>
        <key>name</key>
        <string>GitGutter deleted</string>
        <key>scope</key>
        <string>markup.deleted.git_gutter</string>
        <key>settings</key>
        <dict>
          <key>foreground</key>
          <string>#F92672</string>
        </dict>
      </dict>
      <dict>
        <key>name</key>
        <string>GitGutter inserted</string>
        <key>scope</key>
        <string>markup.inserted.git_gutter</string>
        <key>settings</key>
        <dict>
          <key>foreground</key>
          <string>#A6E22E</string>
        </dict>
      </dict>
      <dict>
        <key>name</key>
        <string>GitGutter changed</string>
        <key>scope</key>
        <string>markup.changed.git_gutter</string>
        <key>settings</key>
        <dict>
          <key>foreground</key>
          <string>#967EFB</string>
        </dict>
      </dict>
      <dict>
        <key>name</key>
        <string>GitGutter ignored</string>
        <key>scope</key>
        <string>markup.ignored.git_gutter</string>
        <key>settings</key>
        <dict>
          <key>foreground</key>
          <string>#565656</string>
        </dict>
      </dict>
      <dict>
        <key>name</key>
        <string>GitGutter untracked</string>
        <key>scope</key>
        <string>markup.untracked.git_gutter</string>
        <key>settings</key>
        <dict>
          <key>foreground</key>
          <string>#565656</string>
        </dict>
      </dict>

[joerchan]

GitGutter works well as long as diff syntax is supported.
see #51