[Feature request] have Slipstream display file & line number when patching fails

[crabdancing]

As it stands, it seems that Slipstream doesn't do this, as seen from a bit of defective code I was working on earlier:

java.lang.IllegalArgumentException: Unrecognized mod tag <text> (/wrapper/findNa
me(START_GAME_EVENT)/text).                                                     
        at net.vhati.modmanager.core.XMLPatcher.handleModCommands(XMLPatcher.jav
a:429)                                                                          
        at net.vhati.modmanager.core.XMLPatcher.patch(XMLPatcher.java:71)       
        at net.vhati.modmanager.core.ModUtilities.patchXMLFile(ModUtilities.java
:306)                                                                           
        at net.vhati.modmanager.core.ModPatchThread.patch(ModPatchThread.java:289)
        at net.vhati.modmanager.core.ModPatchThread.run(ModPatchThread.java:92)

It would be very useful if it told me more information! :) Perhaps something like:

Unrecognized mod tag <text> in events.xml.append:35