Latest dev repetier-firmware supports that protocol. It will show percentage as a bar if you have graphic display and also the file you are currently printing. Should work with latest server release.
especially the PROGRESS capability. Marlin already has cap protocol also in some releases disabled by default. Hope they have changed that meanwhile. No idea why one would not want firmware to tell host it can do some cool stuff.
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http://www.reprap.org/wiki/Firmware_Capabilities_Protocol
especially the PROGRESS capability. Marlin already has cap protocol also in some releases disabled by default. Hope they have changed that meanwhile. No idea why one would not want firmware to tell host it can do some cool stuff.