Added time_getunixtime() function.
Unit test to show that without repyportability, dylink's module cache provides the same module instance (and thus correct instance of an imported exception class) to each importer of that module. Contrast with portability/tests/ut_portability_catch_nestedimported_exception.py, and SeattleTestbed/portability#28.
Adding a very permissive default restrictions file.
commit
Merge branch 'v2' into seattlelib_ticket_137
Added `time_interface.time_getunixtime` to time.r2py.

Following the example of the other `time.time_*` functions, I
include `getunixtime` (defined in time_interface.r2py) to
time.r2py too. It thus suffices to `dy_import_module("time.r2py")`
to get access to the time functions.
Added missing module names to imports from `parallelize`.
Corrected indentation.
Band-aid to get seash imports and Affix overrides right. See SeattleTestbed/seash@35ec6398778ed8f242157e35408dd436334eb0ee for details.