Add sample calendar with single instance appointment starting at
local time and with 1 hour duration
HACK: mapistore/python: preload libpython2.7 with RTLD_GLOBAL

This is for sesequent modules loading to work
HACK: Skip provisioning every time mailbox is opened
HACK: Makefile: don't install python backends - i'm using symbolic link
WIP: mapipstore_backend: Gather as much context as we can - don't fail if backend fail

oxio for instance doesn't support this call yet
HACK: oxio.py: Prefix folder names with 'OXIO-' so it is visble when it come from
HACK: Skip provisioning every time mailbox is opened
HACK: Makefile: don't install python backends - i'm using symbolic link
WIP: mapipstore_backend: Gather as much context as we can - don't fail if backend fail

oxio for instance doesn't support this call yet
HACK: oxio.py: Prefix folder names with 'OXIO-' so it is visble when it come from
Revert "HACK: Skip provisioning every time mailbox is opened"

This reverts commit c61f63c5c40fa3e964b281c1ad66635b92b8802f.
mapistore/oxio: Store username duirng list_contexts() only we haven't one yet
mapistore/oxio: Dynamically reload messages before opening ContentsTable
mapistore/oxio: Fetch Message body in plaintext and html
mapistore/python: Helper script to backup/restore MySQL db
Add SAMDB_LIBS to mapistore_test linkage rule
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