Add support for multiple metadata signatures

Add the ability for the PowerShell cmdlets to pair with either of two
different metadata signatures. This will allow us to upgrade the
metadata signature without breaking PowerShell. Also updated the latest
signature to that of the latest management service.
Support arbitrary number of metadata signatures
Fix static metadata issue

- Actually use the computed metadata hash in the update script
- Fix a typo
- Shorten a verbose loop to one linq.Any() call.
Merge pull request #1 from bcham/dev

Add support for multiple metadata signatures
Merge remote-tracking branch 'remotes/upstream/dev' into dev
Merge pull request #1156 from WindowsAzure-SqlDb/dev

Add support for multiple metadata signatures
Merge pull request #1282 from xmbms/storage

Fix naming issues in storage cmdlet.
Addesd subscription client, can list provider resources
Renamed functions - been doing JavaScript too long
Fixed TPL use to chain async tasks properly.
Registering providers
Unregister implementation
Refactoring and adding comments
Removed extraneous app.config files
Removed another extraneous app.config file
Fixing addition of moq to test project
Merge branch 'dev' into rdfe-registration-working-1238
Responding to code review feedback
Merge pull request #1299 from christav/rdfe-registration-working-1238

Subscription client for RDFE resource type registration