Fix manifest and setup

- include .coveragerc
- Add author, author_email, keywords

    $ check-manifest
    lists of files in version control and sdist match
    $ pyroma .
    ------------------------------
    Checking .
    Found ZODB
    ------------------------------
    Final rating: 10/10
    Your cheese is so fresh most people think it's a cream: Mascarpone
    ------------------------------

MANIFEST.in

@@ -2,6 +2,7 @@ include *.rst
 include *.txt
 include *.py
 include *.ini
+include .coveragerc
 include .travis.yml
 include buildout.cfg
 include COPYING

setup.py

@@ -136,8 +136,11 @@ tests_require = ['zope.testing', 'manuel']
 setup(name="ZODB",
       version=VERSION,
       setup_requires=['persistent'],
+      author="Jim Fulton",
+      author_email="jim@zope.com",
       maintainer="Zope Foundation and Contributors",
       maintainer_email="zodb-dev@zope.org",
+      keywords="database nosql python zope",
       packages = find_packages('src'),
       package_dir = {'': 'src'},
       url = 'http://www.zodb.org/',