Bug Fixes

• Prevent metadata from being accessible in compiler sandbox.

New Forms

• Add tail! which asserts that the argument is called in tail position.
• Add assert-repl to make an assertion which opens a repl when it fails.

New Features

• Add --assert-as-repl flag to replace assert calls with assert-repl.
• Allow you to return a value from the repl with ,return FORM command.
• Save previous REPL values in *1, *2, and *3 locals.
• Make repl prompt change when repl sessions get nested.