Release 0.9.3

Signed-off-by: David Scott <dave.scott@eu.citrix.com>

Merge pull request xapi-project#8 from djs55/master

Fix interaction with /sbin/ip and execute_command_get_output

Bump version to 0.9.1.

Signed-off-by: David Scott <dave.scott@eu.citrix.com>

Merge pull request xapi-project#4 from djs55/first-release

Add standard files.