return the result as an exit code (needed by util/run_tests.py)
describe some of the new features and status
open, read, write, write-substring, close: use the syscall macro
copied from self/selfmac.scm now lives in IRKENLIB under this name
"...consider running install now..."
new install script
updated
New option: -I include paths (supporting irken installation)
New global "the-context" (probably should be named *context*),
  this avoids having to pass it around everywhere.
find-file: search for a file in the set of include dirs