New client SDK + various fixes

Merge pull request #53 from jfsmig/master

SDK improvements, better access logs, svc-monitor fixed.

Accounts, users, async delete

Merge pull request #30 from Reaskel/ble-functionaltests

Functional tests on conscience and directory functions for proxy

Fixed logging, more samples.

By default, the API does not produce log traces.
This must be activated.

Sample client code, fixed installed headers

Minor changes destined to help integrate OIO SDS's C client in external applications.

Fixed memory leaks.

Merge pull request #21 from jfsmig/upstream-release-0.6

metautils: fixed memory leaks when extracting message bodies.

Fixed memory leaks

Memleaks fixed in:

• oio-proxy
• oio-meta1-server

Fixed memory leaks

The meleaks concerned every sqliterepo-based services : meta0, meta1, meta2, sqlx.

Fixed memory management

M2V2 felt when deleting content properties (while setting a property with an empty value)

Fixed instal for python elements

h/t Julien !

Draft for account service.

Merge pull request #14 from jfsmig/master

m2v2: uses ZMQ 3.X instead of ZMQ 4.X