Spen't lots of time debugging the misbehaving COLLADASW::URI
constructor. The problem is although I pass correct parameters to it,
the resulting file ends up having empty url attributes. It is either a
bug in OpenCollada or my code - couldn't figure this out.
- setup SConscript, not sure about these values: libtype='core', priority=150
- only scons build on linux is set up
- not configured to link to OpenCollada yet