[Gtkradiant] [Bug 902] New: Shader parser mangles shader entry names

[gtkradiant@zerowing.idsoftware.com]

http://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=902

           Summary: Shader parser mangles shader entry names
           Product: GtkRadiant
           Version: 1.3
          Platform: All
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: editor
        AssignedTo: ttimo@idsoftware.com
        ReportedBy: rr2do2@q3f.com


CShader::Parse() calls a QERApp_CleanTextureName on each shader entry name, 
causing 'textures/' to be prefixed for every single entry. This is a Bad Thing 
as there can be valid shader paths such as 'models/bleh/doh'.

The only place where we should add 'textures' is upon loading from map (though 
even that is a bad thing tbh, a hack we should only do for games where the 
toolset requires it and we can't fix it)