LogBook initial commit
Merge branch 'log_book' of https://github.com/SamuelTeng/taichungdiving

begin log book coding
Revert "Merge branch 'log_book' of https://github.com/SamuelTeng/taichungdiving"

This reverts commit 016243e9b286aacf08b9b3b7691ab032c536245f.
Merge branch 'master' of https://github.com/SamuelTeng/taichungdiving
Merge branch 'log_book'

log book