Update link on Github pages
Fix warning message printing
Fix faces access for Blender >= 2.62

See
<http://www.blender.org/documentation/blender_python_api_2_62_2/info_gotcha.html>
for details.
fix typo
Tune debug output
Remove redundant spaces
Fix indexing in output
Remove redundant spaces
Serialize buffers using array module

For model with around 50000 vertices and 300000 indices this reduces
export time from few minutes to few seconds on my machine.
Handle loading resource error with alert()
Fix assertion
Update rendering script for new data format
Update example models (new format)