Maxminddb

++++++++++++++++++

* Previously if ``MODE_FILE`` was used and the database was loaded before
forking, the parent and children would use the same file table entry without
locking causing errors reading the database due to the offset being changed
by other processes. In ``MODE_FILE``, the reader will now use ``os.pread``
when available and a lock when ``os.pread`` is not available (e.g., Python
2). If you are using ``MODE_FILE`` on a Python without ``os.pread``, it is
recommended that you open the database after forking to reduce resource
contention.
* The ``Metadata`` class now overloads ``__repr__`` to provide a useful
representation of the contents when debugging.
* An ``InvalidDatabaseError`` will now be thrown if the data type read from
the database is invalid. Previously a ``KeyError`` was thrown.

++++++++++++++++++

* On Python 3 there was a potential issue where ``open_database`` with
``MODE_AUTO`` would try to use the C extension when it was not available.
This could cause the function to fail rather than falling back to a pure
Python mode.

++++++++++++++++++

* The pure Python reader now supports an optional file and memory mode in
addition to the existing memory-map mode. If your Python does not provide
the ``mmap`` module, the file mode will be used by default.
* The preferred method for opening a database is now the ``open_database``
function in ``maxminddb``. This function now takes an optional read
``mode``.
* The C extension no longer creates its own ``InvalidDatabaseError`` class
and instead uses the one defined in ``maxminddb.errors``.

++++++++++++++++++

* First production release.
* Two potential C extension issues discovered by Coverity were fixed:
- There was a small resource leak that occurred when the system ran out of
memory.
- There was a theoretical null pointer issue that would occur only if
libmaxminddb returned invalid data.

++++++++++++++++++

* Corrected initialization of objects in C extension and made the objects
behave more similarly to their pure Python counterparts.

++++++++++++++++++

* Switched to Apache 2.0 license.
* We now open the database file in read-only mode.
* Minor code clean-up.