Fixed bug in transition-position

Fixed bug in transition-position causing it to select the incorrect position in the haystack for many cases.

Test Case:
(local-time::transition-position 13 #(-15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60))
==> 6
Added test for local-time::transition-position
Merge pull request #1 from dlowe-net/tacosundae-tests

Added test for local-time::transition-position
Merge pull request #14 from tacosundae/master

Fixed bug in transition-position