Reduce VM memory consumption

We now have 7 virtual machines in the Vagrant sandbox. This takes a lot
of memory. This might be a problem for some laptop and whon't help
testings.

Signed-off-by: Sébastien Han <sebastien.han@enovance.com>
Merge pull request #43 from leseb/feature-reduce-vm-memory

Reduce VM memory consumption
Improve README file

Clarify the support section, add OS support.

Signed-off-by: Sébastien Han <sebastien.han@enovance.com>
Merge pull request #45 from leseb/improve-read

Improve README file
Remove mon_initial_members option

The mon_initial_members is not used since we declare the mon section in
the ceph.conf file. Later, we could reduce the ceph.conf file by only
using the mon_host flag instead of all the mon sections.

Signed-off-by: Sébastien Han <sebastien.han@enovance.com>
Merge pull request #46 from leseb/fix-mon-initial-members

Remove mon_initial_members option