Fixed 2 flaws. One is about unit, another is about url of special thanks page.
Fixed 2 bugs. One is about reusing annotationView, should not reuse it. Another is about voice countdown when countdown seconds is zero.
Merge branch 'Submission'
Delete redundant code, change website url.
Reverse the order of records in Stats, get the latest record on top.
Changed bar chart title in Stats. Modified PNBarChart to add upper xLabels to display distances. Disabled swipe to delete.
Added version log in settings; changed version into 1.10