Update sample uri to end up with '/'
Update sample fid/mid from uint32_t to uint64_t to include valid replica ID
Hardcode some references to test sample:// backend easily
Fix the list contexts loop
mapistore/oxio.py: Just print proreties in Table.set_columns() w/o any mapping
mapistore/oxio.py: Fake Folder.set_properties() to make Outlook happy
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