Removed obsolete CardiacPropertiesMaterial. Its features are distributed across CardiacFibresMaterial and ElectrocardioConductivity
reduced verbosity of some kernels and materials
fixed compiler warning about unused variables
replace \todo by @todo to make doxugen happy
some cleanup in CardiacNash2000Material.C
Merge branch 'master' into rotated

Conflicts:
	src/materials/CardiacPropertiesMaterial.C
added superclass CardiacMechanicsMaterial
refactored CardiacNash2000Material: is derived from CardiacMechanicsMaterial now