Loutilities

* (fix) googleauth: build with cache_discovery=False (louking/members485)

* (new) user/roles: add racingteam-admin, racingteam-member (louking/members482, louking/members488)
* (new) tables.py: add formencode validation support (louking/members482)
* (fix) flask_helpers/mailer.py: properly handle ccaddr, add replytoaddr (louking/members482)
* (fix) Users view: allow roles to be deleted for inactive user (louking/members490)
* (tweak) tables.DbCrudApi: allow initialization if form field not in mapping (louking/members482)

* (fix) csvwt: add optional encoding parameter to several classes, functions (louking/rrwebapp525)
* (fix) textreader: detect file encoding (louking/rrwebapp525)
* (fix) doc build doesn't require pystache (59)
* (fix) doc build problem, resolve requests/urllib3 conflict (60)

* (fix) applogging: check current_user exists before using (louking/members467)
* (tweak) upgrade a few packages

* (fix) textreader.TextReader csv reads files as utf8 (louking/rrwebapp346)

* (new) csvwt.Db2Csv adds optional encoding parameter (louking/rrwebapp502)
* (new) datatables.js render_select_as_tags() (louking/rrwebapp504)
* (new) tables-assets/static/utils.js gets showerrorpopup()
* (new) tables-assets/static/editor-saeditor.js new parameter after_init (louking/rrwebapp505)