Remove twin-range scheme

Remove twin-range scheme

Only the group scheme supports this, and the Verlet scheme will not
support it in the foreseeable future.

Removed many uses of rlistlong, but replaced some appropriate uses
with rlist. We now have the explicit requirement that rlist >=
max(rcoulomb,rvdw).

Didn't rename variables that contain "shortrange" or "SR" since
they'll mostly disappear with the group scheme

Retained energy components that need to be retained for .edr
compatibility.

gmx compare and dump ignore the old fields

Change-Id: I6ab2ea93bfcea8510969b43e7f06f55d5f350840