Merge code and metadata changes from upstream r603.

Main code change is to rename shortnumberutil to shortnumberinfo,
and add some new entrypoints therein.
Generated Python files for metadata
Merge branch 'dev' into python3

Conflicts:
	python/phonenumbers/data/alt_format_43.py
	python/phonenumbers/data/alt_format_44.py
	python/phonenumbers/data/alt_format_49.py
	python/phonenumbers/data/region_AR.py
	python/phonenumbers/data/region_AT.py
	python/phonenumbers/data/region_CL.py
	python/phonenumbers/data/region_ES.py
	python/phonenumbers/data/region_ML.py
	python/phonenumbers/data/region_MX.py
	python/phonenumbers/data/region_NC.py
	python/phonenumbers/data/region_VE.py
	python/phonenumbers/phonemetadata.py
	python/phonenumbers/phonenumberutil.py
	python/phonenumbers/shortnumberutil.py
	python/tests/examplenumberstest.py
	python/tests/phonenumberutiltest.py
	python/tests/shortnumberinfotest.py