added IO::Spec, started work on IO::Path
add support for IO::Path::<os subclasses>
rename `file-name-is-absolute` to `is-absolute` in IO::Spec
IO::Spec.tmpdir now returns `.` on failure, trying $*TMPDIR out
move IO to later in the build: lib.pm now works, regex works
cleanup tmpdir, remove unused and already commented out code
fix dir(), panda now runs \o/.  Also change splitpath to use :nofile param
Merge branch 'iospec' of https://github.com/labster/rakudo into nom