__all__ must contain native strings.
fixes 2038 problem (see #805)
extra test case for #805
reuse TIMESTAMP0 constant
fixes 2038 problem (see #805)
Conflicts:
	obspy/core/tests/test_utcdatetime.py
	obspy/core/utcdatetime.py
extra test case for #805
reuse TIMESTAMP0 constant
changelog
Merge branch 'releases'

Conflicts:
	CHANGELOG.txt
	obspy/core/utcdatetime.py