added tests for bounded, unbounded index scans
renamed
Various tweaks and cleanups for clarity/consistency
Reuse order by permutation generation
Merge pull request #1 from nathanlws/index-scan-dt-cleanups

Various tweaks and cleanups for clarity/consistency
refactored bounded scans, corrected null handling
clean up
skipped array to list
clean up
clean up
clean up
fix bounds checking when e.g. t0 > 23 && t0 <= 23 are conditions
update test names
add todo for more complex conditions
small renaming
merge hchandl: Added tests for bounded, unbounded mixed-order index scans

Merge pull request #1447 from hchandl/sql-layer/indexTesting
https://github.com/FoundationDB/sql-layer/pull/1447