Added CCL facility r=r "range" which is similar to r=o "ordered"

Added CCL facility r=r "range" which is similar to r=o "ordered"
but does not require white-space before and after the dash, e.g.
x=-1990 is equivalent to x <= 1990 iff r=r, but equivalent to
x= -1980 iff r=o. Added CCL tests for ranges.
Fixed memory leak in CCL parser that occurred when proximity was used.