Update version for Liberty
Update version for Liberty

Update the version for Liberty, switching from date-based versioning
to pre-versioning using SemVer. See
http://lists.openstack.org/pipermail/openstack-dev/2015-May/065211.html
and
http://lists.openstack.org/pipermail/openstack-dev/2015-June/067082.html
for details.

Change-Id: I6a35fa0dda798fad93b804d00a46af80f08d475c

dims/glance,klmitch/glance,paramite/glance,takeshineshiro/glance,vuntz/glance,vuntz/glance,rajalokan/glance,ozamiatin/glance,scripnichenko/glance,klmitch/glance,rajalokan/glance,stevelle/glance,akash1808/glance,takeshineshiro/glance,saeki-masaki/glance,scripnichenko/glance,kfwang/Glance-OVA-OVF,openstack/glance,dims/glance,openstack/glance,kfwang/Glance-OVA-OVF,stevelle/glance,openstack/glance,paramite/glance,akash1808/glance,ozamiatin/glance,saeki-masaki/glance