Clarify tests, properly exit
Add documentation for recent changes
Add simpler and more robust neoteric expression support
Rewrite curly expression reader more in accordance with reference
Temporarily drop neoteric expression support
This makes a good amount of tests fail... ah well
Fix heading in wiki entry
Rename extras to extra, add wiki page
Use standard keyword syntax, check for (#:other) group
Add remaining aliases to mixed-operator-precedence
Fix name conflict warning
Clean up, add associative, rest-arg aliases