For PROJJSON only, also accept the ``name`` attribute.

None of our tables are indexed by a INTEGER PRIMARY KEY, but most of
them are by a (auth_name, code) primary key. Consequently they can
benefit from being created as WITHOUT ROWID tables
(https://sqlite.org/withoutrowid.html), which avoids an index to be
created on the rowid we don't use. WITHOUT ROWID is a feature added in
SQLite 3.8.2, so as our baseline is 3.11, we can use it.

This decreases the DB size from 7,749,632 to 7,229,440 bytes, without
any measurable consequence on performance.

This will create the sqlite_stat* table (generally sqlite_stat1). This
speeds up a bit the test suite. Runtime of ``make test_cpp_api-check``
goes from the range [14.0 s, 14.6 s] to [13.0s, 13.5s] on my machine.

* Add a PROJ_DATA.VERSION in proj.db to indicate the target PROJ-data
  package version
* Make projsync use that information and the version_added and
  version_removed properties added in https://github.com/OSGeo/PROJ-data/pull/67
  to filter out files that are not relevant
* Add --no-version-filtering and --verbose switches