fix arg error message
initial work on lazy loading complex instances
no compile errors or segfaults, but loading complex instances still needs work
disable lazy loading code on windows, since import/export macros don't exist yet
clean up stdout
lazy_test: function to print complex entity info - commented out

Commented out because many eDescs are invalid. Cause unknown; suspect
the situation is the same in p21read / STEPfile.
add to TODO list for lazyInstanceMgr
initialize entity descriptor in one more place. Still missing something...
entity descriptor should probably be const
fix segfault exposed by lazy loading complex instances
cleanup, quell some warnings
oops, need to look for comments after the '=' as well
Merge pull request #237 from stepcode/review/lazy-complex

Lazy loading complex instances