quantities
quaternion and r3element
Merge branch 'remove-dimensionless' into fix-assignment

Conflicts:
	geometry/r3_element.hpp
	geometry/r3_element_body.hpp
Temp fix for multivectors.
Merge branch 'remove-dimensionless' into fix-assignment
Merge branch 'master' into fix-assignment
Fix build.
Fix lint.
Merge pull request #98 from eggrobin/fix-assignment

Fix assignment
InertialFrame is now a template parameter.
better name.
lint lint lint
Merge pull request #99 from eggrobin/templatise

InertialFrame is now a template parameter.