Azurerm

- BREAKING CHANGE:
create_vmss() lb pool parameters are now optional.
New usage:

create_vmss(access_token, subscription_id, resource_group, vmss_name, vm_size, capacity,
publisher, offer, sku, version, subnet_id, location, be_pool_id=None,
lb_pool_id=None, storage_type='Standard_LRS', username='azure', password=None,
public_key=None, overprovision=True, upgrade_policy='Manual',
public_ip_per_vm=False)

location arg is now before LB args, which can be omitted if you're not using a load balancer.

- Media services fixes. Thanks msleal.
- create_asset_delivery_policy() and get_key_delivery_url()

- Add put_vmss() and put_vmss_vm() functions for easy updating of scale set properties.
- Note: put_vmss_vm() is currently preview and won't work outside of Canary environments.

- Integration with msleal's Azure Media Services API wrapper library.
- Part 1: integration of core APIs. Example library integration planned.

- BREAKING CHANGE:
Improved scale_vmss() to no longer require VM size or sku - now it only requires resource group,
VMSS name and capacity. New definiton:
def scale_vmss(access_token, subscription_id, resource_group, vmss_name, capacity)

- Fixed list_vmss_nics() (incorrect API version)