Merged SVN_COMMIT_NAMES_DATES database into SVN_REVNUMS_TO_CVS_REVS.
Extracted from patch by: Oswald Buddenhagen <ossi@kde.org>
Since both databases used Subversion revision numbers as keys, store
the combined information in one database as a tuple.
* cvs2svn (PersistenceManager.put_svn_commit): Store name and date
in svn2cvs_db instead of to separate database.
(PersistenceManager.svn_commit_names_dates): Removed class variable.
(PersistenceManager.get_svn_commit): Read name and date from
svn2cvs_db instead of from separate database.
(PersistenceManager._get_name_and_date): Removed method.
(SVN_COMMIT_NAMES_DATES): Removed global variable.
git-svn-id: http://cvs2svn.tigris.org/svn/cvs2svn/trunk@1790 be7e6eca-30d4-0310-a8e5-ac0d63af7087