Merge pull request #49 from severin-lemaignan/master

[pyassimp] Fixes for python 3.3 and 64bits
Prefer init list and add missing initializations
Fix a logging message and a comment
Merge pull request #52 from asmaloney/minor_changes

Fix a logging message and a comment
Merge pull request #51 from asmaloney/init_fixes

Prefer init list and add missing initializations
Drop M3 Importer.
{COLLADA} Add detail to some errors/warnings & prefer '<>' for elements for readability
Merge pull request #53 from asmaloney/collada_warnings

{COLLADA} Add detail to some errors/warnings
{OBJ} Allow spaces in group names
Merge pull request #55 from asmaloney/OBJ_spaces

{OBJ} Allow spaces in group names
Make sure members are initialized properly
Prefer initialization lists
Assignment operator should not return a const ref
Merge pull request #56 from asmaloney/init_stuff

Make sure members are initialized properly
Remove M3Importer from vc9 solution.
IFC: support reading from IFCZip archives that don't use the same name for the embedded IFC file as the ZIP itself.
Merge branch 'master' of github.com:assimp/assimp into fixes
Exporters: raise errors if output files cannot be opened.
Change spec of obj exporter.
Merge branch 'master' of github.com:assimp/assimp
Forward declare IOSystem in Exporter.hpp
Merge branch 'master' of github.com:assimp/assimp into fixes