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: 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
Revert "HACK: Skip provisioning every time mailbox is opened"

This reverts commit c61f63c5c40fa3e964b281c1ad66635b92b8802f.
Merge branch 'jkerihuel/mapistore-python-DEMO' of https://github.com/openchange/openchange into jkerihuel/mapistore-python-DEMO
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
Merge branch 'jkerihuel/mapistore-python-DEMO' of https://github.com/openchange/openchange into jkerihuel/mapistore-python-DEMO
Merge remote-tracking branch 'origin/jkerihuel/mapistore-python' into jkerihuel/mapistore-python-DEMO
Add SAMDB_LIBS to mapistore_test linkage rule
Merge remote-tracking branch 'origin/jkerihuel/mapistore-python' into jkerihuel/mapistore-python-DEMO