Add regression tests for circles, line segments, and paths.
Modify regression tests to allow GEQ optimizer (order results).

Modified a few tests to match results on RedHat Linux/gcc for v6.1beta.

the DROP TABLE calls from the destroy.sql file to the 'types' .sql files,
so that they are self-contained

btree_index, hash_index and misc all fail as there seems to be missing
a 'misc.out' expected file...have asked Thomas for one...