Remove $.not (! is better.)  Sketch Tamsin grammar in Tamsin.
Implement eof in compiler.
Reorganize files.  Compiler has 29 failures on the core language.
Implement 'any' and 'fail' in compiler.  Only 25 failures now.
Move runtime for compiled version into libtamsin.
Getting some ducks in a row.
libtamsin's string-handling code is now leaky rather than awful.
Handle Concat terms.  Two more tests pass.