Use CompletableFuture::join instead of CompletableFuture::get
when blocking on futures in java tutorial snippets. This avoids
the unreported checked exceptions which prevent the snippets from
compiling (and is in line with the full tutorial code).
Modified all class scheduling documentation pages removing mentioning of UI and updating wording within sections of Done and Are We Done? to be clearer.
Update configuration options within Command Line Interface documentation
Updated language describing Causal Riskiness within Command Line Interface documentation
Removed personal username from Ruby class scheduling documentation file
