Add matrix.h. Matrix implementation for bones.
Add bone.h and bone.cpp files.
Correct some errors
Fix for libtool 2.
Added class Bone.  WIP.
Stash configure.ac again
Fix the names and types of the private bone class members.
Continue filling the bone class
Fix some syntax errors on bone.h and bone.cpp
Remove void commented line
Tidying.
Add TYPE_BONE.
Changes for TYPE_BONE.
Use MAX_LINES instead of hard-coded 6 for the array size.
Spelling mistake.
Increase MAX_LINKS to 8 for bones.
Space things out a little.
Fix a typo.
Typo.
Add strength_.