Fix floating ip allocation

POST message body was missing
Add "networks" attribute to ServerForCreate class
Merge pull request #73 from ow2-sirocco/fix-floating-ip-allocation

Fix floating ip allocate operation
Merge pull request #74 from ow2-sirocco/create-server-with-networks

Add list of networks in Create Server Request attributes
Merge pull request #75 from Rabierre/master

Modified ServersResource's StopServer Constructor
Add Stop and Start Nova Compute Server Example.
Implemented example code of shutdown and srart nova compute server(instance).
Add Stop and Start Nova Compute Server Example.
Implemented stop(shutdown) and start nova compute server(instance) example.
Merge https://github.com/woorea/openstack-java-sdk