Misc · Asking and learning: a poll, a survey, a quiz and flashcards

misc::Poll turns to results once the owner holds the vote, with Change
vote on Vote's stop. misc::Survey asks on one page and sends when each
question is answered, thanking in Submit's place and focus. misc::Quiz
checks, goes on, scores and starts again on one button. misc::Flashcards
turn on a press and go round the deck, each face fading in.

src/misc/mod.rs

@@ -1,8 +1,12 @@
 mod calculator;
 mod captcha;
 mod clock;
+mod flashcards;
+mod poll;
+mod quiz;
 mod scanner;
 mod stopwatch;
+mod survey;
 #[cfg(all(test, feature = "test-support"))]
 mod tests;
 mod units;
@@ -10,6 +14,10 @@ mod units;
 pub use calculator::Calculator;
 pub use captcha::{Captcha, CaptchaState};
 pub use clock::{Clock, WorldClock};
+pub use flashcards::Flashcards;
+pub use poll::Poll;
+pub use quiz::{Quiz, QuizQuestion};
 pub use scanner::QrCodeScanner;
 pub use stopwatch::Stopwatch;
+pub use survey::{Answer, Question, Survey};
 pub use units::UnitConverter;