implement determinant for 4x4 matrices
fix materials for collada <polygon>

First stab at making model importer act more like scene importer.  Upload button still doesn't work.

DEV-41080 - wriggle some method implementations out into header implementations, just enough so that llbboxlocal can be a unit test rather than an integration test.  Slightly dubious about whether it's worth it.

Result of svn merge -r107256:107258 svn+ssh://svn/svn/user/phoenix/license_2009_merge into trunk. QAR-1165

HAVOK4 IN TEH HOUSE!!11!!ONE!!
If it is broken blame Joel for not fixing the loginassetdatabaseinventorygroupIM server instead of working on this.

QAR-448

Result of svn merge -r71162:71205 svn+ssh://svn/svn/linden/branches/new-license into release. only changes files which are not deployed or the comments section of code.