Merge pull request #77 from icandigitbaby/jkerihuel/mapistore-python

Jkerihuel/mapistore-python: add functionality to PyMAPIStoreFolder
pymapistore: add message_get_properties and message_set_properties
pymapistore: set default behaviour for input flags
pymapistore: use talloc_zero_array instead of talloc_array + memset
pymapistore: extra OOM checks + "goto end" shortcuts
pymapistore: use PyDict_Next instead of iterating over a list with the keys