adsmsg/__init__ needs all the probufs

[spacemansteve]

nonbib and metrics are missing.

[spacemansteve]

the follow tests are currently failing and I do not plan to fix them now:

% python adsmsg/tests/test_denormalized_record.py
F..

FAIL: test_full_record (main.TestDenormalizedRecord)
This is here also as a documentation.

Traceback (most recent call last):
File "adsmsg/tests/test_denormalized_record.py", line 111, in test_full_record
self.assertEqual(expected, r.toJSON())
AssertionError: {'body': u'body body', 'read_count': 10, 'doctype_facet_hier': [u'0/Article', u' [truncated]... != {'keywordSchema': [u'Astronomy', u'Astronomy'], 'doctypeFacetHier': [u'0/Article [truncated]...
Diff is 4225 characters long. Set self.maxDiff to None to see it.

% python adsmsg/tests/test_fulltext_update.py
Traceback (most recent call last):
File "adsmsg/tests/test_fulltext_update.py", line 5, in
from adsmsg import FulltextUpdate
ImportError: cannot import name FulltextUpdate

[spacemansteve]

I believe previous simple changes to init.py did not use the pull request review cycle. I will follow this pattern.