Loutilities

* (fix) user/model now works with (and requires) flask-sqlalchemy-3.x (louking/mysql-docker5)

* (fix) applogging doesn't assume sender email address (louking/webmodules43)
* (fix) when interest deleted, update_local_tables now doesn't throw exception (louking/webmodules44)
* (fix) interests and applications view must be super-admin (louking/webmodules45)

* (tweak) Add attachments to mail helper (louking/members446)

* (tweak) support flask-wtf validator keyword arguments (louking/webmodules35)

* (new) tables: add apimethod decorator
* (tweak) AgeGrade: add agegradedata parameter, surface related query (louking/rrwebapp520, louking/rrwebapp123)

* (tweak) mailer.sendmail now logs when mail is stubbed via TESTING or MAIL_SUPPRESS_SEND
* (tweak) filters.yadcfoption now supports range_num (louking/rrwebapp529)
* (fix) tables: clarify when dbmapping, formmapping can be updated
* (fix) filters.py: fix usage comment