fix date format in the machine() (no-zero padding) and add logging facility

add date information to machine room status report, even though there's nothing to report

fix README.md

add README.md

change some phrase

added dialogflow files

database for machine location is completed.

logging feature added ...

now machine's recent log (2weeks) can be retrieved.
and some refinements around ondotori(fixed answer when no data is available).

location service now active

first release