add some delimters indicating the user-configurable area of the makefile, ie those variables which can be specified in the environment. Define MARCH and MTUNE (this latter is slightly tricky) to use 'native' by default. Document how to specify optimization targets for gcc < 4.3.
add some delimters indicating the user-configurable area of the makefile, ie those variables which can be specified in the environment. Define MARCH and MTUNE (this latter is slightly tricky) to use 'native' by default. Document how to specify optimization targets for gcc < 4.3.

dankamongmen/libtorque,dankamongmen/libtorque,dankamongmen/libtorque