delete reserved-ip should prompt only if address exists

Fix for https://github.com/MSOpenTech/azure-sdk-tools-xplat/issues/61
Corrected recording files,modified variable changes and including the test in testlist
Skip empty data blocks during fixed VHD upload
Avoid warning about process.nextTick recursive deferral

This warning can actually lead to a crash.
See https://github.com/MSOpenTech/azure-sdk-tools-xplat/issues/80
Merge remote-tracking branch 'upstream/dev' into dev
Fixing merge conflicts
Merge branch 'orangemocha-fixedvhd' into dev
Merge pull request #72 from MSOpenTech/orangemocha-Issue61

delete reserved-ip should prompt only if address exists
vm create: check virtual network against existing deployment

When the user specifies the --connect option to the vm create command,
and there is an existing deployment, the new VM will use whatever
virtual network the existing deployment belongs to.
If the user also passes --virtual-network-name, we need to check
that the given virtual network matches the existing deployment's.

I also made --virtual-network-name mandatory when --subnet-names is given.

This fixes https://github.com/MSOpenTech/azure-sdk-tools-xplat/issues/65
Merge pull request #82 from MSOpenTech/orangemocha-Issue65

vm create: check virtual network against existing deployment
Merge remote-tracking branch 'upstream/dev' into dev

Conflicts:
	test/testlist.txt
[1]. Support for specialized VMImage in vm create command [2]. commands to manage public-ips [3]. commands to manage endpoint acl
Update nock recording for blob test cases
Merge branch 'dev' of https://github.com/Azure/azure-sdk-tools-xplat into dev
use azure-storage-0.4.0
Revert "Update nock recording for blob test cases"

This reverts commit d1d3f1723b11714a91aed8e528bbc6f8178351db.
Revert "Revert "Update nock recording for blob test cases""

This reverts commit 3d082847969ad786e8bf5f9a70fea5a7b93b0c8f.
Revert "use azure-storage-0.4.0"

This reverts commit 5daa2eb6232fda341ca683102d147b9d306ded9f.
Fix for bug: https://github.com/MSOpenTech/azure-sdk-tools-xplat/issues/91
fixing bug: https://github.com/MSOpenTech/azure-sdk-tools-xplat/issues/92