Feature Request: need for memory error handler when IFC++ fails loading big IFC files.

[GoogleCodeExporter]

IFC++ loading the 288-Mb IFC file has been tested on two PCs. The file can be 
found at http://download2cf.nemetschek.net/www_misc/bim/DCR-LOD_300.zip

The first PC, with 16Gb of RAM, loaded and displayed the IFC file just fine, 
and the other with 4Gb of RAM never completed the loading and got hanging with 
no error messages.

The addition (or, fixing if already present) of an error handler signalling the 
memory issue while loading is needed.

Thanks

Original issue reported on code.google.com by ivano....@gmail.com on 7 Aug 2014 at 12:14