Miscellaneous

• Export missing factory.h header
• couple of emplace_back rather than push_back
• some const reference
• Vector5s & Affine3ds types
• WOLF_ASSERT_COVARIANCE_MATRIX assert macro & helper functions
• check for some nullptr

added 1 commit

• 0396beb0 - Remove wolf:: namespace ...

Compare with previous version

I removed this, not necessary since we are in namespace wolf:: anready

@jsola actually I think it is necessary if one want to use this macro outside wolf namespace.
I will double-check tomorrow.

mentioned in commit 0d2951b9

merged