[PD] IEMMatrix help files missing in Pd-E

[Georg Holzmann]

Hallo!

> Title pretty much says it all... none of the mtx objects help files
> seem to be in the builds.  I haven't updated my dev layout in a while
> but they're present in externals/iem/iemmatrix/doc and abs here.
> 
> Also having the creation issue when using the symbolic representations
> of operators, e.g. mtx_<= will not create until mtx_le has been.  I
> remember reading about this before and can't remember the outcome, so
> apologies if this is redundant information.

As far as I can see the iemmatrix-objects are not build at all for 
pd-extended (at least not in externals/makefile) - so also the help 
patches won't be installed ...

LG
Georg