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Create VM in virtual network's affinity group

Fix for https://github.com/MSOpenTech/azure-sdk-tools-xplat/issues/7
Delete new cloud service when VM creation fails
Fixed issue https://github.com/MSOpenTech/azure-sdk-tools-xplat/issues/11. Added support for VM Images for 'vm image list' command.
update release files
add more change information
mention new php version in changelog
Fix network vnet create command

When an existing network is associated with a location, and not
an affinity group, network vnet create would fail.
Fix vm create in vnet without affinity group

When creating a vm in a virtual network, we would fail if the virtual
network was not associated with any affinity groups.
Fix vm docker create command
Merge branch 'dev' of https://github.com/MSOpenTech/azure-sdk-tools-xplat into dev

Conflicts:
	lib/commands/asm/vm/vmclient.js
Commands for managing static IP addresses

Added commands:
azure vm static-ip show <vm-name>
azure vm static-ip set <vm-name> <ip-address>
azure vm static-ip remove <vm-name>
azure network vnet static-ip check <vnet> <ip-address>

Added --static-ip option to:
azure vm create
azure vm docker create