Fix _ssh_client_connect method to correctly propagate an exception if a key file
doesn't exist instead of silently swallowing and ignoring it.
Bump version to 0.15.1
Modify deploy_node so it's future proof and will also work correctly when
authentication bug (https://github.com/paramiko/paramiko/pull/351) has been
fixed in paramiko.
Merge branch 'trunk' of https://git-wip-us.apache.org/repos/asf/libcloud into trunk
Updating Compute Engine image project list

Signed-off-by: Tomaz Muraus <tomaz@apache.org>
LIBCLOUD-593: CloudStack driver's create_node fails to join network_id when network_id is int

Closes #336

Signed-off-by: Sebastien Goasguen <runseb@gmail.com>
LIBCLOUD-594: Add firewall rule support for CloudStack driver

Closes #337

Signed-off-by: Sebastien Goasguen <runseb@gmail.com>
Updating CHANGES file to add fixes and features from the development trunk
Improve release instructions